2012 GMC Sierra TSBs

the driver information center after performing the Canada Onstar 4G upgrade. If the concern is present park the vehicle outside and call General Motors Technical Assistance Center.

system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

Engine Soon lamp, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise. Technician will follow service information diagnosis first. If service information diagnosis does not isolate the cause of this concern perform a cylinder deactivation active fuel management system compression test in service information. If the running compression of the misfiring cylinder stays below 25 Pounds per Square Inch regardless of the active fuel management solenoid being commanded on or off, an active fuel management lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started. Replace all active fuel management lifters, and all plastic lifter guides. Also perform the cylinder deactivation active fuel management Valve Lifter Oil Manifold Diagnosis and Testing in Service Information. If it isolates a concern with the Valve Lifter Oil Manifold, replace it and reevaluate the concern. The active fuel management lifters can also be monitored for proper operation by carefully inspecting the cylinder 1, 4, 6, and 7 rockers and valves while cranking or briefly and safely running the engine with the valve covers removed. If the valve or valves of an active fuel management cylinder stop moving while doing this test, the active fuel management lifter is causing the concern. For 2008-2009 Full Size Truck/SUV or a 2007-2009 Chevrolet Tahoe with the Police Package reprogram the Engine Control Module. On the 2008-2009 Pontiac G8, 2010-2011 Camaro, and 2007-2010 Full Size Trucks with active fuel management, also determine if the active fuel management pressure relief valve shield that is listed in the latest version of 10-06-01-008 has ever been installed. On passenger cars with the LS4 engine, determine if the updated oil pan gasket that is listed in the latest version of 11-06-01-007 has been installed.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

system that has progression tones when pressing the blue or red button. Technician will need to call General Motors Technical Assistance Center with the scan tool data from the OnStar system.

with the scan tool, if the navigation radio does not display the current Hybrid mode. Dealer will use a scan tool to check communication with Accessory Direct current Power Control Module, Air Condition control module, Drive Motor Generator Power Inverter Module, Engine Control Module, Battery Energy Control Module, and Transfer Case Control Module. Repair the loss of communication with the affected module and the power flow should return to the radio display.

have low oil pressure after an oil change with the engine Regular Production Option Code L20, L77, L94, L96, L99, L9H, LC8, LC9, LH9, LMF, LMG, LY6, or LZ1. Vehicle may have Service Engine Soon lamp with Diagnostic Trouble Code P0521 or Low Oil Pressure message on the instrument panel. Dealer will need to determine if bulletin 10-06-01-008 was completed. If the bulletin was performed inspect the left rocker cover. Dealer will insure the left rocker can hold water without leaking. If leaks are found apply room temperature vulcanization silicone to the rocker cover if possible or replace the left rocker cover.

severe internal engine damage.

filter.

concern for intermittent Malfunction Indicator Lamp (MIL) illuminated with Reduced Engine Power displayed and DTC P2138 set.

severe internal engine damage.

Fluid Low", "Exhaust Fluid Empty - Refill Now", "Exhaust Fluid Range: XXX" or "Service Exhaust Fluid - See Owners Now" on the Driver Information Center. If the technician is working on 2010 and 2011 model years campaign 11001 has now been released. Other vehicles technician will need to check the Body Control Module and the scan tool to insure the latest calibration are installed in both. Then use the scan tool to check Reductant System Data in the Engine Control Module. Ensure that all three diesel exhaust fluid level sensors are active with the diesel exhaust fluid tank level showing 100%. If the tank level is below 100% add up to 2 gallons of diesel exhaust fluid. After adding the fluid, use a scan tool to reset the reductant fluid tank level. When the reductant level warning shows "none" the diesel exhaust fluid system reset and reprogram is complete.

buzz, moan, rattle, whine, or vibration type noise that can typically be heard at idle or low revolutions per minute. The noise does not indicate a problem and will not result in damage to the pump or the engine. If the customer is dissatisfied with the oil pump whine noise replacement of the oil pump will resolve the concern.

Technician will need to replace the propeller shaft. Technician will need to contact General Motors Technical Assistance Center for further assistance if the vehicle was built January 1, 2013 or later.

or vibration from the engine or transmission. Technician will need to inspect the flex plate. The flex plate and transmission bell housing should be replaced if the flex plate is found cracked.

will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

Assembly will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

engine whine noise at 1500-1800 revolutions per minute. Technician will need to check the coolant level, remove serpentine belt to verify noise goes away, rotate the thermostat 90 degrees and retest, then replace thermostat and retest. Technician will replace the water pump if there is no change.

vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.

Engine Soon Malfunction Indicator Lamp on. Technician will find Diagnostic Trouble Code P0420. Technician will need to follow published Service Information diagnostics. Technician will check for a possible leak in the exhaust system behind the bank 1 sensor 2 O2 sensor. Technician will need to reposition the exhaust clamp or replace with a wider band clamp.

engine whine noise at 1500-1800 revolutions per minute. Technician will need to check the coolant level, remove serpentine belt to verify noise goes away, rotate the thermostat 90 degrees and retest, then replace thermostat and retest. Technician will replace the water pump if replacing the thermostat does not repair the audible engine whine noise.

pressure, no oil pressure, and/or engine noise. Technician will need to replace the oil pump, flush the oil cooler lines.

engine tick noise for 50 seconds at start up. Technician determines if the tick noise is possibly coming from the exhaust manifold, as this noise could easily be mistaken for an engine tick noise. If your SI diagnosis does not isolate the cause of this concern, this concern should be considered a vehicle design characteristic of the ECM calibration and no additional repairs should be performed.

Technician may find Diagnostic Trouble Code P0701 P0729 P0731 P0732 P0733 P0734 P0735 P0751 P0756 P0761 P0877 Or P2723 set. Technician will need to inspect the valve body separator plate orifices for debris.

Production Option Code (LGH and LML) part number 12638502 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

Code LGH or LML may have an Exhaust Fluid Quality Poor message displayed on the Driver Information Center. Technician will need to complete the current Service Information diagnostic for any current Diagnostic Trouble Codes or symptoms found. If an Exhaust Fluid Quality Poor message is displayed with a specific Diagnostic Trouble Code, use that specific Service Information diagnostic, and repair the vehicle as necessary. If the dealer has found an Exhaust Fluid Quality Poor message with no Diagnostic Trouble Code, diagnose the condition using the current Service Information diagnosis for Diagnostic Trouble Code P20EE / P207F (P2BAD for 2012 and newer model years). After making repairs use the Service Information Document titled "Reductant Fluid Quality Test (With or without Diagnostic Trouble Codes)" to evaluate and clear the Exhaust Fluid Quality Poor Driver Information Center message.

additional information if SI diagnosis leads to replacement of the Indirect Fuel Injector for a P0420 Diagnostic Trouble Code. Technician should follow published Service Information diagnostics for Diagnostic Trouble Code P0420. Technician will need to also gather quantity of fuel flow measured, engine hours, type of vehicle, and estimated percentage of time the vehicle spends at idle.

Technician should inspect the camshaft part numbers. Technician should ensure to use part number for the application by using the numbers stamped on the cam.

and/or momentary lack of power after cold starting the engine and immediately placing the transmission in gear. Technician should follow published Service Information diagnostics first. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

Engine Soon Malfunction Indicator Lamp on, engine misfire, and/or engine noise. Technician may find Diagnostic Trouble Codes P0300-P0308. If published Service Information diagnostics does not isolate the cause of this concern technician should check for a worn camshaft lobe and/or lifter roller, a sticking valve, valve leakage, a broken valve spring, and a collapsed active fuel management lifter.

parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

between the vehicle and a Bluetooth phone. Technician will need to use a scan tool to check the "Firmware Over-the-Air" value. If the "Firmware Over-the-Air" value is up to date and customer's concern is still present contact General Motors Technical Assistance Center for further assistance.

Trouble Code B101D-37 history in the Vehicle Communication Interface Module or telematics communication interface control module. Engineering has determined that this code will only display in history on the scan tool and will not cause issues with OnStar system operation.

General Motors will only support a tire calibration for tires that have been sized, tested and designed for the vehicle in question and its applications. Technician should not use the information that is provided by the antilock braking system tire size selection.

Charging System" message displayed on the Driver Information Center and/or a low voltage reading on the volt gauge during the first several minutes after a cold start. Technician may find a Diagnostic Trouble Code B1517 sym 03. If this concern only occurs during the first several minutes of a cold start, no repairs should be made. Dealer should communicate to the customer that this is normal operating characteristic of vehicles equipped with the diesel engine.

radio controls, Integrated Center Stack, display, and Media Disc Players are placed on restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

vehicles that have windows inoperative while the engine is running but work when the engine is off. Technician should look for aftermarket parts and remove them and retest the windows before any in depth diagnostics are performed.

Pressure Modulator Valve for the 2-Mode Hybrid Utilities and Trucks will be placed on a parts restriction through the General Motors Technical Assistance Center. Dealer will need to contact for further assistance.

brake assist after disconnecting the battery or after the 12 volts battery has run low on voltage. The Antilock Braking System Malfunction Indicator Lamp may also be on. Technician may find Diagnostic Trouble Code C121D sym 00 or C056D sym 00 set in the Electronic Brake Control Module. Technician should be advised to wait for a period of at least 1 minute with the ignition in the "OFF" position prior to disconnecting the negative battery cable. Technician will need to follow these steps to repair the concern. 1. Install the negative battery cable to the battery. 2. Rotate the lever lock clockwise until an audible click is heard in order to connect the negative battery cable to the battery. 3. Position the negative battery cable insulating cover over the negative terminal. 4. Start the vehicle without stepping on the brake pedal. 5. Shut the vehicle "Off" for one minute. 6. Restart vehicle and check brakes for proper operation. 7. Clear codes in the Engine Control Module and the Electronic Brake Control Module.

Technician may encounter multiple issues when diagnosing a Vehicle Speed Sensor. Technician will find it difficult to follow the speed signal path between the components. To test connect the Fluke meter leads between circuits 821 and 822 and set the meter to Alternating current voltage and then press the hertz button. When the Engine Control Module showing correct miles per hour in the data list however it is setting a Diagnostic Trouble Code for the Vehicle Speed Sensor. To test connect the Fluke meter red lead to circuit 6399 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button. The Instrument Panel Cluster speedo will work correctly when the Engine Control Module or Antilock Braking System Diagnostic Trouble Codes are for the Vehicle Speed Sensor. To test connect the Fluke meter red lead to circuit 1827 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button. When the Antilock Braking System Malfunction Indicator Lamp on with Electronic Brake Control Module Diagnostic Trouble Code C0055 and no other customer complaints, to test connect the Fluke meter red lead to circuit 817 and the black lead to ground, then set the meter to Direct current voltage and press the hertz button.

Technician may find Diagnostic Trouble Code P0101. Technician should follow published Service Information diagnostics for any Diagnostic Trouble Codes that are set. If during diagnosis the tech has found that the Airflow Leak Equivalency Ratio or Induction System Leak Indication is above or below the specification the tech will have to carefully check for leaks in the air intake.

buzz, whine, squeal, or hum noise from the radio display. Dealer should communicate to the customer that we apologize for this inconvenience and that General Motors is working on a solution for this concern.

power on initial acceleration from a stop when the ambient temperature is approximately 103 Fahrenheit or greater and may include engine detonation or pre-ignition type events as temperatures approach 120 Fahrenheit. Technician will need to perform published Service Information diagnosis first. If Service Information diagnosis does not isolate the cause of this concern, take a Tech 2 snapshot of the concern happening and note the Spark Parameter in the Ignition Data List. If it drops near/below 0 degrees during the concern, check if there is a cylinder that shows any knock. If there is a knock in any cylinder perform a top engine clean. If the concern is still present, then switching to premium fuel (91 octane or higher) with detergents (Top tier fuel) when ambient temperatures exceed 110 Fahrenheit degrees, this should provide a slight improvement in engine performance when ambient temperatures are high especially as temperatures approach 120 Fahrenheit degrees.

or vibration from the engine or transmission. Technician will need to inspect the flex plate. The flex plate and transmission bell housing should be replaced if the flex plate is found cracked.

key is turned to the start position, and then released when the engine begins cranking, the engine will continue cranking for a few seconds or until the vehicle starts. Some customers may state that this feature is inoperative. Technician should be advised that if the Low Fuel warning lamp is on and/or the FUEL LEVEL LOW message is displayed in the Driver Information Center, the Computer?Controlled Cranking System will be disabled.

Technician may find Diagnostic Trouble Code B3894 set in the Trailer Brake Control Module. Technician should follow published Service Information diagnostics first. Technician should check the "Master Cylinder Pressure" sensor parameter listed in the Trailer Brake Control Module data list. If it is displaying pressure with no brake pedal input, suspect a concern with the Master Cylinder Pressure Sensor, wiring/terminals, or Electronic Brake Control Module.

Engine Soon lamp, engine misfire on cylinder 1, 4, 6, or 7 and/or tick noise. Technician will follow service information diagnosis first. If service information diagnosis does not isolate the cause of this concern perform a cylinder deactivation active fuel management system compression test in service information. If the running compression of the misfiring cylinder stays below 25 Pounds per Square Inch regardless of the active fuel management solenoid being commanded on or off, an active fuel management lifter is mechanically collapsed/stuck or unlocking as soon as the engine is started. Replace all active fuel management lifters, and all plastic lifter guides. Also perform the cylinder deactivation active fuel management Valve Lifter Oil Manifold Diagnosis and Testing in Service Information. If it isolates a concern with the Valve Lifter Oil Manifold, replace it and reevaluate the concern. The active fuel management lifters can also be monitored for proper operation by carefully inspecting the cylinder 1, 4, 6, and 7 rockers and valves while cranking or briefly and safely running the engine with the valve covers removed. If the valve or valves of an active fuel management cylinder stop moving while doing this test, the active fuel management lifter is causing the concern. For 2008-2009 Full Size Truck/SUV or a 2007-2009 Chevrolet Tahoe with the Police Package reprogram the Engine Control Module. On the 2008-2009 Pontiac G8, 2010-2011 Camaro, and 2007-2010 Full Size Trucks with active fuel management, also determine if the active fuel management pressure relief valve shield that is listed in the latest version of 10-06-01-008 has ever been installed. On passenger cars with the LS4 engine, determine if the updated oil pan gasket that is listed in the latest version of 11-06-01-007 has been installed.

Engine Soon Malfunction Indicator Lamp on a rough running engine, and/or oil consumption. Technician will find Diagnostic Trouble Code P0300 set. Technician will apply regulated air pressure through the PCV pipe and spray soapy water where the PCV baffle and valve cover meet with soapy water to inspect for possible signs of a leak. Technician will replace the value cover if a leak is present.

Number 24256861 has been removed from the General Motors Product Quality Center parts restriction.

Some vehicle may have service hybrid system lamp that comes on with a Diagnostic Trouble Code P061B set. Technician will need to take a snap shot of the Electronic Brake Control Module and call General Motors Technical Assistance Center for further assistance. Some vehicles may have a combination of engine stall at a stop, lacks power on acceleration, surge while driving, engine flare, transmission slip, poor or lower fuel economy or reduced EV range/limited electric propulsion since completion of recent programming. Technician will need to perform a Charge Procedure. Some vehicles have Diagnostic Trouble Code P0BBD stored without Diagnostic Trouble Code P061B or P0AFA. Technician will verify that the Drive Motor Battery was not run low on charge due to a no start concern.

engagement into drive, delayed, no engagement into reverse, and or a range inhibit. Technician may find Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723. Technician should follow published Service Information diagnostics for Diagnostic Trouble Code P0701 first. Technician will also ensure the fluid level is at the top of the hot band when the transmission fluid temperature is 175 Fahrenheit. Diagnostic Trouble Codes P0701, P0731, P0732, P0733, P0734, P0736, P0751, P0756, P0761, P0776, P0843, P0848, P0873, P0877, P0894 or P2723 can set by the following fluid service/filter change, transmission service involving removing the pan, low fluid level caused by leaks, or after long periods of storage. If the fluid level has been properly checked using the HOT check procedure listed in Service Information document 2408059 and any of the Diagnostic Trouble Codes reset during a cold start inspect the internal suction filter for possible cracks. If no other concerns are found inspect for a stuck lube regulator valve in the pump cover due to debris.

Technician may find Diagnostic Trouble Codes P0701, P0729, P0731, P0732, P0733, P0734, P0735, P0751, P0756, P0761, P0877, or P2723. Technician will inspect the valve body separator plate orifices for blockage due to an aftermarket spin-on filter.

Trouble Code B101D stored in Telematics Communication Interface Control Module. Technician will need to call General Motors Technical Assistance Center for further assistance. If the Diagnostic Trouble Code B101D has a sym 37 set please refer to the latest version of PIC5492.

repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages " Brake Pedal Override Feature ", transmission busy or frequent shifting up or down. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor.

Engine Soon Malfunction Indicator Lamp on. Technician may find DTCs P057C and or P057D. Some vehicles may have cruise and brake light operation service stability message with Diagnostic Trouble Codes C0161 and C0277. Technician will need to inspect connector X205 for loose, backed out, or bent terminals using the appropriate terminal test probe.

If a technician has duplicated, or the customer description aligns with the speeds mentioned in the idle speed description tables, the idle speed should be considered a normal characteristic of current vehicle design.

has been placed on restriction through the General Motors Product Quality Center to assist Engineering with product feedback. Dealer will need to contact General Motors Product Quality Center for further assistance.

or engines during there break in period.

15231895, 22768282, 22770967, 22887212, 22893734 and 22977171 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

15231895, 22768282, 22770967, 22887212, 22893734 and 22977171 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

15231895, 22768282, 22770967, 22887212, 22893734 and 22977171 will be placed on a parts restriction through the General Motors Product Quality Center. Dealer will need to contact General Motors Product Quality Center for further assistance.

Fluid Low", "Exhaust Fluid Empty - Refill Now", "Exhaust Fluid Range: XXX" or "Service Exhaust Fluid - See Owners Now" on the Driver Information Center. If the technician is working on 2010 and 2011 model years campaign 11001 has now been released. Other vehicles technician will need to check the Body Control Module and the scan tool to insure the latest calibration are installed in both. Then use the scan tool to check Reductant System Data in the Engine Control Module. Ensure that all three diesel exhaust fluid level sensors are active with the diesel exhaust fluid tank level showing 100%. If the tank level is below 100% add up to 2 gallons of diesel exhaust fluid. After adding the fluid, use a scan tool to reset the reductant fluid tank level. When the reductant level warning shows "none" the diesel exhaust fluid system reset and reprogram is complete.

Technician may find Diagnostic Trouble Code P0101. Technician should follow published Service Information diagnostics for any Diagnostic Trouble Codes that are set. If during diagnosis the tech has found that the Airflow Leak Equivalency Ratio or Induction System Leak Indication is above or below the specification the tech will have to carefully check for leaks in the air intake.

If a technician has duplicated, or the customer description aligns with the speeds mentioned in the idle speed description tables, the idle speed should be considered a normal characteristic of current vehicle design.

Code LGH or LML may have an Exhaust Fluid Quality Poor message displayed on the Driver Information Center. Technician will need to complete the current Service Information diagnostic for any current Diagnostic Trouble Codes or symptoms found. If an Exhaust Fluid Quality Poor message is displayed with a specific Diagnostic Trouble Code, use that specific Service Information diagnostic, and repair the vehicle as necessary. If the dealer has found an Exhaust Fluid Quality Poor message with no Diagnostic Trouble Code, diagnose the condition using the current Service Information diagnosis for Diagnostic Trouble Code P20EE / P207F (P2BAD for 2012 and newer model years). After making repairs use the Service Information Document titled "Reductant Fluid Quality Test (With or without Diagnostic Trouble Codess)" to evaluate and clear the Exhaust Fluid Quality Poor Driver Information Center message.

check to turn off motion sensor" message on the Driver Information Center. If this message is displayed, the vehicle has a General Motors Accessory shock sensor, motion sensor or inclination sensor installed. Dealer should advise the customer this is normal operation with this accessory installed.

repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages ? Brake Pedal Override Feature ?, transmission busy or frequent shifting up or down, and Diagnostic Trouble Codes P057B, P057C, and/or P057D may or may not be set. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor. If an engine control module brake pedal position sensor relearn is performed, the truck may be temporarily repaired until the intermittent wiring issue between the engine control module and brake pedal position sensor occurs again. On 2014 and newer trucks inspect and repair any damage to X115 and X119. On the 2014 and previous trucks inspect and repair any damage to X205.

Engine Soon Malfunction Indicator Lamp on or reduced engine power message. Technician may find Diagnostic Trouble Codes P2120, P2122, P2123, P2125, P2127, P2128, and/or P2138. Technician will need to inspect the Accelerator Pedal Position circuits for poor terminal tension.

Charging System" message displayed on the Driver Information Center and/or a low voltage reading on the volt gauge during the first several minutes after a cold start. Technician may find a Diagnostic Trouble Code B15517 sym 03. If this concern only occurs during the first several minutes of a cold start, no repairs should be made. Dealer should communicate to the customer that this is normal operating characteristic of vehicles equipped with the diesel engine.

between the vehicle and a Bluetooth phone. Technician will need to use a scan tool to check the "Firmware Over-the-Air" value. If the "Firmware Over-the-Air" value is up to date and customer's concern is still present contact General Motors Technical Assistance Center for further assistance.

Module and Auxiliary Transmission Fluid Pump placed on parts restriction by General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

on parts restriction by General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

vehicles that may have a Service Engine Soon Malfunction Indicator Lamp on at low mileage. Technician may find Diagnostic Trouble Codes P0420 and or P0430 stored. Technician should be advised that the catalytic converter efficiency Diagnostic Trouble Codes P0420 and P0430 are disabled for the first hour of engine run time to allow break-in of the catalytic converter. Technician will need to use a Tech2 to check the verify engine run time on the Engine Hour Meter in the Instrument Panel Cluster Data Display/Data 1 List in the scan tool match. If the engine run time is less than one hour, the battery may have been disconnected, or another vehicle power loss event may have occurred, during vehicle manufacturing. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle. If the catalytic converter was replaced and the Diagnostic Trouble Codes set it may be a result of the engine run time restrictions no longer being in place since the vehicle is no longer new. Technician will need to clear the Diagnostic Trouble Codes and perform a drive cycle.

restriction through the General Motors Technical Assistance Center. Dealer will need to contact General Motors Technical Assistance Center for further assistance.

repairing vehicles that may have unwanted grade braking, reduced engine power with no Driver Information Center messages "Brake Pedal Override Feature", transmission busy or frequent shifting up or down. Technician will use this preliminary information to find the brake pedal position data parameters in the scan tool, and also to provide some additional diagnostic help. These issues may be caused by an incorrect brake pedal position sensor input to the engine control module. Technician will verify with the scan tool if the engine control module has the correct parameters for the brake pedal position sensor.

Technician may find Diagnostic Trouble Code P2636 has set. Technician should be advised that the vehicle is being refueled with the engine running or ignition on.

vehicles that may have a no crank concern. Technician will need to check the valve train for movement when the engine is cranked. If the valve train is not moving while the crankshaft is moving the front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the valve train is rotating during inspection, disconnect the Camshaft Position sensor and check if the engine will start. If the engine starts front cover will need to be removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly. If the engine does not start with the Camshaft Position sensor disconnected the follow published "Engine Cranks But Does Not Run" diagnosis in Service Information. Also perform an Engine Compression Test and Cylinder Leakage Test in Service Information documents all results. If the Service Information procedures above isolate an engine mechanical concern then removed to inspect for a sheared cam sprocket locator pin. If the cam sprocket locator pin has sheared, replace the engine assembly.

ENGINE TICK NOISE FOR 50 SECONDS AT START UP. TECHNICIAN DETERMINES IF THE TICK NOISE IS POSSIBLY COMING FROM THE EXHAUST MANIFOLD, AS THIS NOISE COULD EASILY BE MISTAKEN FOR AN ENGINE TICK NOISE. IF YOUR SI DIAGNOSIS DOES NOT ISOLATE THE CAUSE OF THIS CONCERN, THIS CONCERN SHOULD BE CONSIDERED A VEHICLE DESIGN CHARACTERISTIC OF THE ECM CALIBRATION AND NO ADDITIONAL REPAIRS SHOULD BE PERFORMED.

Technicians may find DTC P0751 set or stored in history. This condition may be caused by the Clutch Select Solenoid Valve 2 (359), located in the lower valve body, sticking in its bore resulting in a 4th gear start. Note: This condition can be very intermittent and difficult to duplicate.

RESTRICTIONS, BY PRODUCT QUALITY CENTER (PQC). MODEL 2010-16 DURAMAX. *PE

MODEL 2010-14 AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, YUKON. *PE

SHORTING OF WIRES, OVER HEATING SYSTEM, ELECTRICAL FAILURE AND COMPARTMENT ENGINE FIRES. MODEL 2003-15 EXPRESS CUT AWAY VANS, SILVERADO CHASSIS CAB, SAVANA CUT AWAY VANS, SIERRA CHASSIS CAB. *PE

MODEL 2002-15 SILVERADO, SIERRA, 2004-09 KODIAK C4500-C5500, TOPKICK C4500-C5500, 2006-15 EXPRESS, SAVANA. *PE

MALFUNCTIONS, DIC MESSAGES, IPC WARNING INDICATORS, SES LIGHT ON. *PE

CYLINDER PAST EXHAUST OR INTAKE VALVE, LOW STATIC COMPRESSION, SENSOR IS DISCONNECTED, OR WHILE CRANKING, VALVE TRAIN FAILS TO MOVE. MODEL 2009-2014 CORVETTE, CAMARO, EXPRESS, SS, SILVERADO, SUBURBAN, TAHOE, SAVANA, SIERRA, YUKON. *PE

MODEL 2008-2014 VEHICLES AND TRUCKS. *PE

DTC U0101 MAY BE SET. MIL MAY BE ILLUMINATED. *JS

THIS COULD BE THE RESULT OF A STICKING OIL PUMP PRESSURE RELIEF VALVE. *KB

ACCESSED ELECTRICAL SYSTEMS THAT ARE AFFECTED BY DEVICES THAT ARE PLUGGED IN AND BECOME INOPERATIVE DUE TO AN OPEN FUSE AND NO PROBLEM WITH VEHICLE IDENTIFIED. MODELS YEARS 2010-2014 TRUCKS AND PASSENGER. NO MODELS. *PE

THERE MAY ALSO BE INCREASED ENGINE NOISE, OR POSSIBLE HIGHER RPM SHIFTS, AND REDUCED A/C PERFORMANCE. *KB

THERE MAY ALSO BE SOME UP AND DOWN SHIFTS WITH THE TRANSMISSION. *KB UPDATED 10/15/14. *PE UPDATED 11/12/14. *PE

*KB

THIS COULD BEGIN TO HAPPEN AFTER THE REPLACEMENT OF THE SPIN-ON OIL FILTER. DTC CODES P0701, P0729, P0731, P0732, P0733, P0734, P0735, P0751, P0756, P0761, P0877 OR P2723. *KB UPDATED 11/27/20132 *JS

BEFORE STARTUP A FEW MINUTES LATER. MODELS 2009-2013 EXPRESS, SILVERADO, SUBURBAN, SAVANA, SIERRA. *PE

CHECK IS PERFORMED AND MAY BE CAUSED BY ENGINE CONTROL MODULE (ECM) WITH A REDUCED ENGINE POWER MESSAGE. MODEL 2011-2013 EXPRESS, SILVERADO; SAVANA, SIERRA. *PE

CONNECTOR X205, TERMINAL CONCERN, CRUISE/BRAKE LIGHT OR SERVICE STABILITY MESSAGE OR REDUCED ENGINE POWER. MODELS 2012-2013 ALL ESCALADES, AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA AND ALL YUKONS. *PE

TO BLOWER MOTOR FAILING TO WORK PROPERLY. MODELS 2012-2013 ESCALADE, ESV, EXT; AVALANCHE, SILVERADO, SUBURBAN, TAHOE; SIERRA, YUKON, YUKON DENALI, YUKON XL, YUKON XL DENALI. *PE

THE SITUATION IS INTERMITTENT. MODELS 2011-12 CADILLAC-ESCALADE, ESCALADE ESV & EXT; GMC-SIERRA, YUKON & XL, YUKON DENALI & XL DENALI; CHEVROLET-TAHOE, SUBURBAN, AVALANCHE & SILVERADO. *PE UPDATED 9/26/12. *PE

STARTER MOTOR BECOMES INOPERATIVE. MODELS 2013 CHEVROLET AVALANCHE, SILVERADO AND GMC SIERRA. *PE

HARNESS TERMINAL CRIMPS, TRUCKS HAVE A MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATION AND REDUCED ENGINE POWER DISPLAY MESSAGE. *PE

NEW FOR THE 2012 MODELS IS A DUAL BRAKE PEDAL POSITION (BPP) SENSOR (TWO SENSORS IN ONE). THE DUAL BPP REPLACES THE OLD STYLE OPEN/CLOSED BRAKE SWITCH WHICH HAS BEEN USED FOR YEARS. *JS MODELS 2012-13 ALL ESCALADES; AVALANCHE, EXPRESS, SILVERADO, SUBURBAN, TAHOE; SAVANA, SIERRA, ALL YUKONS AND DENALIS. UPDATED 11/28/12. *PE

MAY CAUSED PROBLEMS WITH POWER STEERING PUMP. *PE

THE FRONT AXLE VENT HOSE IS MOUNTED IN THE LEFT SIDE OF THE ENGINE COMPARTMENT, AND MAY NOT BE CORRECTLY ROUTED. *PE UPDATED ON 5/1/2012. *KB

Communication Interface Modules (VCIM).

have a different style mirror installed on their vehicle or request a different mirror before they purchase the vehicle. Swapping mirrors on vehicles equipped with Side Blind Zone Alert, Regular Production Option Code UFT, is not recommended. On other vehicles tech will need to verify if the vehicle is equipped with door modules or not. On vehicles with door modules technician will need to contact Techline Customer Support for new calibrations for both doors. On vehicles not equipped with door modules no calibrations are needed.

diagnosing a diagnostic trouble code P0420. Check for a possible leak in the exhaust system behind the bank one number 2 oxygen sensor. If a leak is found or there is an aftermarket utility bed or trailer hitch installed. Check for a minimum clearance of 1.5 to 2 inches of the exhaust system.

Technician will need to use a scan tool to verify that the alarm was activated by the inclination sensor. If the trigger is the inclination sensor, inspect the sensor's mounting location. Technician will need to relocate the sensor if it is attached to the driver's side lower Heater-Vent-Air Conditioning duct. Technician will need to reinstall the sensor to the top of the Body Control Module bracket.

Inspection it may be noticed that the backup alarm is inoperative. Technician can locate the wire harness on the right rear of the frame. Technician can route the harness up and over the spare tire hoist tube and connect to the backup alarm.

4WD message displayed in the Driver Information Center. Technician may find Diagnostic Trouble Code C0379. Technician will need to inspect the front axle actuator connector for signs of moisture intrusion. If there is corrosion on the terminals at either location replace the actuator and harness.

that's not accurate or slow to update. Technician should check for a magnetic base roof mounted accessory interfering with the compass module.

crank condition after the vehicle has had very low accessory battery voltage or a dead battery condition. Technician may find Diagnostic Trouble Code P0C76 set. Technician should be advised that anytime a battery charger or booster pack is connected to the 12 volt battery, the ignition key should always be in the off position. If a battery charger or booster pack is connected to the 12 volt battery with the ignition key on tech will need to reset the Hybrid Powertrain Control Module Diagnostic Trouble Codes.

The roof beacon switch will be left disconnected from the assembly plant. When a roof beacon light is added technician will need to plug the harness into the switch.

Trouble Code B0081 in the Sensing and Diagnostic Module and Passenger Presence Sensor modules. Technician should inspect the Sensing and Diagnostic Module and Passenger Presence Sensor powers, grounds, and communication circuits at all in line connectors for fully seated, backed out terminals, and proper terminal tension using the correct test probes.

Control on a vehicle which did not come equipped with the option. Technician will need to contact the Techline Customer Support Center to determine if a calibration is available for the vehicle. If they are able to provide a calibration for the vehicle then order steering wheel with cruise control buttons, steering wheel sir coil, and steering column wiring harness.

panel backlighting flashes, flickers or inoperative, unwanted horn activation, radio controls inoperative or unwanted activation, OnStar unwanted activation, and cruise control inoperative. Technician should inspect for a short to ground on the steering wheel near the Supplemental Inflatable Restraint coil connector X2 and make necessary repairs to any shorted circuits and then position the wiring.

rear heated seats are inoperative and/or the driver's power seat only moves in short bursts each time the seat switch is operated. Technician will need to reprogram only the affected module (Memory Seat Module, Rear Heated/Vented Seat Module, or Front Seat Heating Control Module) with updated calibrations in Tis-2-Web.

override the automatic door locking feature. Technician will update the Body Control Module on 2006 to 2007 model years. On 2010 to 2014 model years technician will need to contact Techline Customer Support for calibrations.

electrical concerns and or intermittent no crank. Technician will need to remove the 175 amp Mega Fuse and inspect for arcing. If any type of arcing is found replace the affected components. Technician will also check the voltage drop on the positive and negative and the torque of the cable at the starter.

Control on a vehicle which did not come equipped with the option. Technician will need to contact the Techline Customer Support Center to determine if a calibration is available for the vehicle. If they are able to provide a calibration for the vehicle then order steering wheel with cruise control buttons, steering wheel sir coil, and steering column wiring harness.

and opening the driver's door that they can turn the radio on. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

panel backlighting flashes, flickers or inoperative, unwanted horn activation, radio controls inoperative or unwanted activation, OnStar unwanted activation, and cruise control inoperative. Technician should inspect for a short to ground on the steering wheel near the Supplemental Inflatable Restraint coil connector X2 and make necessary repairs to any shorted circuits and then position the wiring.

equipped with RPO 6E2 or 6E8 and converting to fleet mode. Technician will need to ensure fleet vehicles with RPO 6E2 or 6E8 should be checked to verify that the Theft Deterrent Module is in fleet mode prior to attempting to add keys.

Communication Interface Modules (VCIM) (GMNA Only)

stock to the steering angle sensor connector to correct a condition of service stabilitak message displayed in DIC and DTC C0455 or C0710

The roof beacon switch will be left disconnected from the assembly plant. When a roof beacon light is added technician will need to plug the harness into the switch.

radio screen is blank or flashes on and off, no sound from speakers, and rear DVD screen inoperative. Technician will find Diagnostic Trouble Codes B1265, B1288, or B1289. Technician will need to repair circuit 7066.

Trouble Code B2555 may be found in a Driver and/or Passenger Door Module. Technician should ignore the Diagnostic Trouble Code if set in a DDM and/or PDM on a vehicles not equipped with front door panel courtesy lights.

the GM Accessory Heated Seat Kit, one or more of the following issues may be present the heated seat back and/or bottom turns off after approximately 30 seconds and after turning on the heated seat switch, the indicators remain on, but the seat is not heating. Technician may find Diagnostic Trouble Codes B1935 Sym 0E, B2180 Sym 0E, B2425 Sym 0D, and/or B2430 Sym 0D. Technician will need to inspect the accessory heated seat wiring harness and make sure the heater element connectors are installed correctly.

CONTROL MODULE AND THE SEAL KIT HAS ENDED.

MODEL 2007-2013 AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, YUKONS. 8PE

MODELS 2012-2013 AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, YUKON, YUKON XL. *PE

BACKLIGHTING FLASHES, FLICKERS OR INOPERATIVE DUE TO POSSIBLE SHORT TO GROUND ON STEERING WHEEL COIL CONNECTOR X2. MODELS 2007-2013 ESCALADES MODELS, AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, YUKON MODELS. *PE

*JS UPDATED 5/22/12. *JS UPDATED 2/5/16. *PE

regarding the differences of the Dexos oils.

find growing concerns around them.

and Canada only).

for causing multiple customer concerns that do not have other diagnostic methods to identify them.

contact PQC prior to replacing an assembly (U.S. and Canada only).

Dealers Only).

of poor, limited, reduced Remote Keyless Entry (RKE) or Remote Vehicle Start (RVS) range.

Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 miles per hour at any given speed when looking straight at the needle.

seats will not cool when using remote vehicle start. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

availability of the passenger compartment air filter. Dealer should advise the customer starting in 2003 the passenger compartment air filter is no longer available as a factory option.

from the openings under the bed rails near the stake pockets. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

passenger flooring wet, water sloshing noise, and/or mist from the dash vents. Technician will need to rotate the drain hose to clear the heat shield.

Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. Technician should be advised that the vehicle must have Keyless Entry Regular Production Option Code (AU0/AU3) and Regular Production Option Code YE9 or Y91 to be equipped with content theft alarm.

a personalized easy exit seat and/or power tilt column position and they will only move a predetermined amount. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

Dealer should advise the customer the specification for speedometer needle accuracy is +/- 2 MPH at any given speed when looking straight at the needle.

TECHNICIAN WILL GAIN ACCESS TO THE ROLLER ROCKERS TO INSPECT THEM. ONLY REPLACE THE ROLLER ROCKER THAT IS MISSING NEEDLE BEARINGS. BE SURE TO CLEAN THE OIL DRAINS TO RETRIEVE THE NEEDLE BEARINGS. EACH ROLLER ROCKER HAS 66 BEARINGS.

*PE

ALSO INCLUDED MODELS VERANO, REGAL, LACROSSE, CTS, SRX, VOLT, SONIC, MALIBU, IMPALA, EQUINOX, CRUZE, AVALANCHE, TAHOE SUBURBAN, SILVERADO, SIERRA, YUKON, AND TERRAIN FOR MODEL YEAR 2013. MODEL ESCALADE MODEL YEAR 2012-2013. MODEL PONTIAC G3 MODEL YEAR 2007. MODEL WAVE MODEL YEARS 2005-2010. DENALI MODELS MODEL YEARS 2007-2013. *JS

or a harsh 6-5 downshift while driving at 50 to 70 miles per hour. Technician will reprogrammed the Transmission Control Module and a FastLearn procedure will need to be performed to correct the condition.

or a harsh 6-5 downshift while driving at 50 to 70 miles per hour. Technician will reprogrammed the Transmission Control Module and a FastLearn procedure will need to be performed to correct the condition.

noise when driving above 30 miles per hour in third and fourth gear. Technician will need to replpace the Reaction Carrier, Low and Reverse Roller Clutch Race, and the Low and Reverse Roller Clutch.

noise when driving above 30 miles per hour in third and fourth gear. Technician will need to replace the Reaction Carrier and the Low and Reverse Roller Clutch.

buzz, tick, or vibration type noise that appears to be coming from the center of the dash. Technician will adjust the transmission dipstick tube away from the front of cowl to provide additional clearance.

Indicator Lamp is illuminated and the vehicle has a harsh 1-2 shift. Technician may find Diagnostic Trouble Code P0741 set in the Transmission Control Module. Technician will need to replace the torque converter clutch solenoid and wire harness with part number 24237980.

grunt type noise when shifting from 2nd to 3rd gear. Technician should replace the 3-4 clutch Friction and Steel Clutch Plates along with the Apply Plate and Selective Backing Plate.

Indicator Lamp is illuminated and the vehicle has a harsh 1-2 shift. Technician may find Diagnostic Trouble Code P0741 set in the Transmission Control Module. Technician will need to replace the torque converter clutch solenoid and wire harness with part number 24237980.

noise when driving above 30 miles per hour in third and fourth gear. Technician will need to replace the Reaction Carrier and the Low and Reverse Roller Clutch.

noise when driving above 30 miles per hour in third and fourth gear. Technician will need to replace the Reaction Carrier and the Low and Reverse Roller Clutch.

bump, chuggle, or fishbite sensation when crowding the throttle slightly with the Torque Converter Clutch on while cruising at 35-60 miles per hour. Technician should follow all published Service Information diagnostics if the concern is repaired compare to a like vehicle with the same options.

to a transmission control module reprogram to correct a harsh or tie up feeling from 6-4 downshift

power steering noise or fluid leak from power steering pump, gear or high pressure hose during extreme low temperature conditions.

SELECT DOCUMENT SEARCH BUTTON BELOW. WHEN SHIFTING FROM FIRST GEAR TO SECOND GEAR, HARSH SHIFTING IS EXPERIENCE AND MALFUNCTION INDICATOR LAMP (MIL) WILL ILLUMINATE. MODEL 2012 SILVERADO, EXPRESS, COLORADO, SIERRA, SAVANA, CANYON. *PE

INDICATOR LAMP (MIL) WOULD BE ON, WITH DIAGNOSTIC TROUBLE CODE (DTC) P0796 FOUND AS ACTIVE. *PE

THAT CAN RESULT IN NOISE AND POOR OPERATION OF TRANSMISSION. MODEL 2012 SILVERADO HD, SIERRA HD. *PE

IN 3RD AND 4TH GEARS DUE TO POSSIBLE 3-4 CLUTCH DISTRESS. *PE

THE TCC ENABLE SOLENOID AND WIRE HARNESS SHOULD BE REPLACED WHEN REPAIRS ARE PERFORMED ON TRANSMISSION. *PE

*JS UPDATED 05/3/2013 *JS

INTERMITTENT CHIME OPERATION, VARIOUS IP WARNING LAMPS ILLUMINATED, TRANSMISSION MAY NOT SHIFT, COMMUNICATION DTCS U0073, U0100, U0101, U0102 U0121 OR U0140 SET (REPAIR TERMINALS IN TRANSMISSION HARNESS CONNECTOR, REPAIR OPEN OR SHORTED GM HIGH SPEED LAN CIRCUITS, OPEN OR SHORTED DATA LINK RESISTOR, CORROSION OR POOR CONNECTIONS IN VARIOUS CONTROL MODULE CONNECTORS). *JS

COMING FROM AUTOMATIC TRANSMISSION WHEN SHIFTING INTO PARK WHILE IN 4WD LOW (4LO) RANGE. *PE

*PE

*RM UPDATED 4/16/12. *PE UPDATED 6/18/12. *PE UPDATED ON 7/09/2013. *KB

THERE MAY BE SERPENTINE BELT PROBLEMS CAUSING IT. *RM UPDATED ON 06/27/2011. *KB UPDATED 3/12/12. *PE UPDATED 1/2/14. *PE *PE

repair the vehicles that may have unwanted or phantom phone calls. Technician will need to determine what type of call the customer is having that is unwanted. The vehicle may receive an incoming call just like any other phone. Typically the customer will hear the phone ringing in the vehicle. This scenario also includes incoming Bluetooth calls. One type of unwanted call can be made if the key pad is faulty the OnStar system will try to make a blue button call for shorted voltage in the circuits. The OnStar module could have an internal fault and produce a "Phone Unavailable" audio message also it may have a Diagnostic Trouble Code U1500 or B1000. Refer to diagnostics for the Diagnostic Trouble Code making sure to follow any applicable Bulletins or Preliminary Information sheets. A "Ready" or "OnStar ready" audio message heard while driving. In some cases it has been found that the customer is inadvertently pressing the ?push to talk? button on the steering wheel controls. On rare occasions, other issues in the steering column or Steering Wheel Control system may induce this concern.

perform a successful brake bleed on the 2-Mode Hybrid with Regular Production Option Code HP2. With a battery maintainer installed on the vehicle use brake pressure bleeder that maintains 30 psi for the entire bleed procedure.

to be replaced if the brake pedal moves or applies on its own at a full turn.

relearn procedure is required anytime the Electronic Brake Control Module is replaced or has been Service Programming System reprogrammed.

Braking System lamp followed by a Service Stability message in the Drivers Information Center. Technician my find Diagnostic Trouble Code C0710 set in the Electronic Brake Control Module. Technician may or may not find Diagnostic Trouble Code C0455. Technician will need to ensure the steering wheel is properly installed to the steering shaft.

to be replaced if the brake pedal moves or applies on its own at a full turn.

in the pad friction material, when performing a brake inspection. Technician should be advised that the hairline cracks do not affect the operation of the brake system and the pads should not be replaced if only hairline cracks are found.

Stability Message" appears on the Drivers Information Center. Technician will find Diagnostic Trouble Code C0561 set in the Electronic Brake Control Module. Technician will need to address any other Diagnostic Trouble Codes that are set in the vehicle first before working on Diagnostic Trouble Code C0561.

factory Integrated Trailer Brake Controller Regular Production Option Code (JL1) be installed on their Full Size pickup/utility when the vehicle was not ordered with the option. Dealer should advise the customer that if the vehicle does not have the option Regular Production Option Code (JL1) it cannot be added to the vehicle.

Some customers may be looking to add steering stabilizer. Technician may find that a steering stabilizer is listed in the parts catalog group but is not intended to address vibrations or brake pulsations.

BRAKE SYSTEM MESSAGE, IS OFF AND GAUGES, IN VARIOUS MODULES LOW SPEED SETTINGS, ARE INOPERATIVE. MODELS 2007-13 ALL ESCALADES; AVALANCHE, SILVERADO, SUBURBAN, TAHOE; SIERRA, ALL YUKONS AND DENALIS. *PE

BRAKE PEDAL PARAMETERS, WHEN BRAKE PEDAL IS RELEASED BUT SHOWS APPLIED. MODELS 2007-2013 ALL ESCALADES, AVALANCHE, SILVERADO, SUBURBAN, TAHOE, SIERRA, ALL YUKONS. *PE

usage of E85 fuel in GM vehicles.

feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank.

reading showing varying diesel particulate filter soot mass readings on a 2012 Silverado or Sierra. Technician should check the Tech 2's software version if the version is 31.00 the scan tool will need to be updated.

rattle type noise during light acceleration around 1200-2000 Revolutions per minute. Technician will need to reposition the fuel line and bracket down away from the floor pan.

feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle. The bump clunk issue may be due to fuel movement in the fuel tank when not completely full. The condition is eliminated after completely filling the fuel tank.

start, no start, rough running, or low fuel pressure. Technician may find Diagnostic Trouble Codes P0087, P0088, P0191 and P128E during the inspection. If during the inspection of the fuel system contamination is found the complete fuel system will need to be cleaned and flushed. After the fuel system is cleaned out test the fuel using PIT3173C.

Technician may find a P0420, P24A0 and/or P2463 set. Technician should use published Service Information diagnostics for the Diagnostic Trouble Code. If the diagnostic leads to diagnosis or replacement of the Q57 Indirect Exhaust After treatment Fuel Injector, document all of your test results.

Technician may find a P0420, P24A0 and/or P2463 set. Technician should use published Service Information diagnostics for the Diagnostic Trouble Code. If the diagnostic leads to diagnosis or replacement of the Q57 Indirect Exhaust After treatment Fuel Injector, document all of your test results.

Technician may find Diagnostic Trouble Codes. If Diagnostic Trouble Codes are found technician should use published Service Information diagnostics first. If fuel leaks are found at the high pressure pump to fuel rail line fitting connections, technician should inspect the high pressure line fittings for misaligned lines and/or low torque of the line nuts. If leaks are found at the high pressure line fittings, technician will need to replace both lines.

PRESSURE LINE FITTING OR FUEL RAIL CONNECTION. 2010-2015 EXPRESS, SIERRA, SAVANA, SILVERADO. *PE

NORMAL SI DIAGNOSTICS MAY BE INCONCLUSIVE OR LEAD TO A FUEL INJECTION PUMP REPLACEMENT. *JS UPDATED 11/12/14. PE

*PE UPDATED ON 5/2/2012. *KB

refered to Article 3.2.9 of the 1st addition manual for details of Technician Identification and Accounting of Labor Time

acceptable - customer authorization; Service manager approvals and transaction authorization; Details of concern, cause and correction; Labor Time; Technician ID and acoutablity of labor time; Proper documentation and retension of warranty parts; Accurate sublet charges and receipts; Add on concerns after the Job Card has been written.

Operations and Customer Enthusiasm

tools that include consumable parts (U.S. Only).

programs.

Service Agents not required to contact PQC prior to assembly replacement.

only) for service operations.

warranty claims submission procedures that support Labor Operation 0600014 - Suspected Tampering or Vehicle Modifications.

(WPC), and Parts Return Program information.

Empowerment Program and Goodwill Cases.

labor operation numbers and how to submit CCND.

Technician will use the chart to determine the proper axle lubricant to use.

when using Bluetooth voice recognition with an iPhone. Technician should work with the customer to insure the phone contacts to not have any Emojis loaded to any contact.

While in the United States they are unable to receive Turn-by-Turn directions. Due to the existing cellular provider not having roaming agreements in areas outside of Canada to support transmitting of the packet data required for Turn-By-Turn feature to operate. The customer has 3 options while traveling through the United Sates. First if the vehicle is equipped with a navigation radio they can request a "Destination Download" to the vehicle. Second if the customer uses the OnStar RemoteLink app they can send the directions to the vehicle. The third option would be to have the vehicle loaded with a "500 phone number" The customer will no longer be able to use their Hands Free Calling minutes when the new 500 phone number is loaded. If a customer chooses to restore Hands Free Calling in the future a new phone number will be assigned to the vehicle; previous phone numbers are not available.

availability of OnStar bluetooth on their vehicle. Technician should be advised that Vehicles with Regular Production Option Code (UPF or UWE) offer Bluetooth through the OnStar system.

IN DRIVER INFORMATION CENTER (DIC) AND MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATES. MODEL 2008-2013 ESCALADE, SILVERADO, TAHOE, SIERRA, YUKON. *PE

RADIO DISPLAY MAY BE INOPERATIVE OR FLICKER - EXPIRES WITH BASE WARRANTY. *KB

THE STABILITRAK INDICATOR LIGHT MAY ALSO BE ON. *JS UPDATED ON 7/9/2013. *KB

settings for concernc regarding noice drop outs during calls and muffled sound.

flushing services and additives) and proper use of GM simplified maintenance schedules (Canada only).

Technician should be advised that the puddle lamps to operate, "Approach Lighting" must be turned on using the Drivers Information Center buttons.

This is a visual condition that will not affect durability, reliability or performance of the tires. Dealer should communicate to the customer that slight sidewall indentations are a common characteristic of radial tire construction.

For the puddle lamps to operate they must be turned on using the Drivers Information Center buttons and it must be dark outside.

INDICATING LOW OIL PRESSURE AND/OR SES LAMP WILL ILLUMINATE. MODEL 2007-13 CANYON, SIERRA, SAVANA, YUKON, CTS-V, ESCALADE, AVALANCHE, CAMARO SS, COLORADO, CORVETTE, EXPRESS, SILVERADO, SUBURBAN, TAHOE. *PE

up-fitter may have removed the rear bumper, install a different rear bumper, or add a different box/flat bed/cube box/hitch, etc. to the rear of the truck, which affects the rear park assist operation. Technician can disable the rear park assist for this concern.

window express down feature is inoperative. Technician should be advised that models equipped with either Memory Seats Regular Production Option Code (AN3) and/or Power Folding Mirrors Regular Production Option Code (DL3) will have the passenger window express down feature. Dealer should advised the customer if the vehicle does not have one of the Regular Production Option Codes AN3 and or DL3, this is a normal operating characteristic.

window express down feature is inoperative. Technician should be advised that models equipped with either Memory Seats Regular Production Option Code (AN3) and/or Power Folding Mirrors Regular Production Option Code (DL3) will have the passenger window express down feature. Dealer should advised the customer if the vehicle does not have one of the Regular Production Option Codes AN3 and or DL3, this is a normal operating characteristic.

not lower slowly like the New 2014 Silverado 1500 / Sierra 1500 models. Dealer should communicate to the customer this condition is a normal operating characteristic of their vehicle.

THE PROBABLY CAUSE AN INCORRECT INSTALLATION OF A HANDLE COMPONENT. *RM UPDATED ON 7/26/2013. ALL 2014 AND PRIOR GM PASSENGER CARS AND TRUCKS. *KB

for a clunking noise coming from the rear of the vehicle.

concern for a clunking noise coming from the rear of the vehicle.

Technician should not replace the bearing for grease purge. Technician should be advised to not clean the purged grease from the area immediately on or adjacent to the seals because this grease provides additional protection. Technician should only replace the bearing if the seals show visible damage, bearing endplay is greater than 0.005" or 0.13mm, bearing exhibits rough rotation, or bearing exhibits abnormal noise.

noise originating from the rear of the vehicle.

UPON FURTHER INVESTIGATION, THE TECHNICIAN MAY DIAGNOSE THE NOISE COMING FROM THE REAR SUSPENSION LEAF SPRING AREA. *PE UPDATED 6/30/2011. *KB

Program and Global Warranty Management (GWM) Submission Information.

management submission information.

and Utilities may ask if they can lower their tire pressures. Tire pressures being set to the "Tire and Loading Label" will ensure the safe handling and ride characteristics of the truck and should not be lowered.

growl, or moan coming from the vehicle when operating the vehicle in four wheel drive. Driving on clean, dry pavement in Four-Wheel Drive High or Four-Wheel Drive Low for an extended period of time may cause premature wear on your vehicle's power train. Dealer should advise the customer not drive on clean, dry pavement in Four-Wheel Drive High or Four-Wheel Drive Low for extended periods of time.

emanating from HVAC system.

leak on the front passenger side while driving. Technician will need to use black RTV silicone and apply over the seam between the upper and lower Heater-Vent-Air Conditioning case halves.

moan, or buzz type noise heard from either inside the passenger compartment, or from under the hood. Technician will need to replace the new design hose with the first design hose. Technician will also rotate the inlet heater hose.

MAY NOT BE ANY AIR FLOW FROM THE HVAC VENTS. ONE POSSIBLE OF THIS CONDITION MAY BE THE CONTACTS IN THE HVAC JUNCTION BLOCK(S) LOCATED AT THE RIGHT SIDE OF THE INSTRUMENTAL PANEL. *JS UPDATED 1/24/13. *PE

is considered a fluid leak, and what is considered seepage.

Technician will need to contact Techline Customer Support Center to obtain calibrations if adding Remote Keyless entry.

Technician will need to contact Techline Customer Support Center to obtain calibrations if adding Remote Keyless entry.

ON SOME 2011-2012 TRUCKS, A GRINDING NOISE AND VIBRATION WOULD BE NOTICEABLE DUE TO THE REAR AXLE RIGHT HAND SIDE BEARING ADJUSTER CLIP AND BOLT MAY COME LOOSE INSIDE OF REAR AXLE. *PE UPDATED 9/6/12. *PE UPDATED 7/18/14. *PE UPDATED 11/6/15. *PE

AN UPDATED SOFTWARE CALIBRATION HAS BEEN RELEASED TO ADDRESS THIS CONDITION. ALSO INCLUDED IN MODELS YEARS 2010-2012 MODEL:CADILLAC ESCALADE HYBRID; CHEVROLET SILVERADO HYBRID; CHEVROLET TAHOE HYBRID;GMC SIERRA DENALI; GMC SIERRA HYBRID;GMC YUKON HYBRID; GMC YUKON DENALI HYBRID. *JS

ON CERTAIN MODEL VEHICLES, A CONDITION WHERE ROOF RAIL AIRBAGS, MAY BEEN IMPROPERLY ROUTED ON RIGHT SIDE, RESULTING IN DEPLOYMENT. *PE

FRONT OF VEHICLE UNDERNEATH AND SHOULD BE INSPECTED, CLEANED AND IDENTIFIED BEFORE REPAIRING OR REPLACING. MODEL 2010-14 LACROSSE, 2011-14 REGAL, 2007-14 ESCALADE, SUBURBAN, TAHOE, YUKON, YUKON XL, YUKON DENALI, YUKON DENALI XL, 2013-14 XTS, 2005-14 MALIBU, 2007-13 AVALANCHE, SILVERADO, SIERRA, 2006-10 G6, 2007-09 AURA. *PE

ALL POTENTIAL LEAKS SHOULD BE COMPLETELY CLEANED AND INDENTIFIED BEFORE ATTEMPTING TO REPAIR OR REPLACE ANY POWER STEERING COMPONENTS. *JS UPDATED 4/22/13. *PE