2012 Mack Granite (gu) TSBs
185 Technical Service Bulletins across 14 categories
Categories
Engine
45 bulletinsCBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise.
Read full bulletin
US07 And Newer Emissions, Model Year 2008 And Newer.
Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure (Low Oil Pressure)...
Read full bulletin
(Possible Related Codes - SPN4811 , SPN 100 , PID 100)
CBR: Automated Manual Transmission (AMT) Model D or F (mDrive and I-Shift, AMT-D, AMT-F) - Transmission Oil Leakage From...
Read full bulletin
Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil.
Read full bulletin
It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this issue.
CBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the...
Read full bulletin
engine may move excessively and rub the area where it secures the line.
Barksdale Leveling Valve, Leak Test
CBR: Programming Failure - Chassis With Cummins Engine And An Allison Transmission
CBR: Mack Chassis - Allison Reduced Engine Load At A Stop (RELS) Diagnostic Trouble Code P071a Or P07ce - GR,TE,LR...
Read full bulletin
Models - Non-Split/Drop Box PTO
Barksdale Height Control Valve Troubleshooting Guide
Programming Failure - Chassis With Cummins Engine And An Allison Transmission
US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting.
Vehicles Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F ) - Transmission Oil Leakage From...
Read full bulletin
Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer.
Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions
Low Oil Pressure Diagnostic Process For 11 Liter Engines
Manual Compression Test Adapter For Engines With Stainless Steel Injector Sleeves (Conical Tip Injectors) - US07 And...
Read full bulletin
Newer Emissions, Model Year 2008 And Newer
Mack Chassis - Diagnostic Trouble Codes ( DTC's ) - P020113, P020213, P020313, P020413, P020513, P020613, Cylinders 1...
Read full bulletin
Through 6 Injector A Open Circuit
Mack Chassis - Equipped With An Automated Manual Transmission Model D or F (mDrive, AMT-D, AMT-F) - Transmission Oil...
Read full bulletin
Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
Engine Oil Analysis Specifications - US10 And Newer Emissions
Mack Chassis - Pinnacle (CHU,CXU,PI), Anthem (AN), Granite (GU,GR) With Mack Engine ONLY - Power Take Off ( PTO ) Engine...
Read full bulletin
Speed Control Inoperative; Engine Speed Does Not Ramp When PTO Is Activated - Model Year 2007 And Newer
Variable Geometry Turbo (VGT) Calibration: Premium Tech Tool (PTT) Displays "Motor Disabled" Message, Operation Will...
Read full bulletin
Not Run, Will Not Complete When Running Operation; Poor Performance Following Calibration - US10 And Newer Emissions, Common Model Years 2014 And Newer
Fuel Injector Offset Learning Diagnostic Trouble Codes ( DTC ) / Fault Codes Logged In Engine Control Module ( EMS );...
Read full bulletin
Possible Rough / Uneven Idle - OBD15 Chassis
MACK TRUCK: DIAGNOSTIC TROUBLE CODES (DTC) ILLUMINATES INFORMATION DISPLAY WHEN TWO OR MORE ACTIVE DTC ARE SIMULTANEOUS...
Read full bulletin
AND ENGINE ECM NEED CALIBRATION TRANSFER FROM ELECTRONIC SYSTEMS DATABASE AND NETWORK (ESDN), USING INSITE, AS REQUIRED, FOR CORRECTION. MODEL 2012-15 GU. *PE
MACK: WHEN SUSPENSION, ON SOME TRUCKS, IS LEFT DUMPED, THERE ARE NO WARNING LIGHT, BUZZER OR ROAD SPEED LIMIT, DUE TO...
Read full bulletin
VEHICLE ELECTRONIC CONTROL UNIT (VECU) SOFTWARE FAILS TO SUPPORT VENDOR ENGINES REGARDING THIS FUNCTION. MODEL GU, CXU. *PE
MACK: WHEN SUSPENSION IS LEFT DUMPED, NO WARNING LIGHT, ROAD SPEED LIMIT OR BUZZER DUE TO SOFTWARE IN VEHICLE...
Read full bulletin
ELECTRONIC CONTROL UNIT (VECU) IS NOT SUPPORTING VENDOR ENGINES AND NEEDS REPROGRAMMING. MODEL 2011-2013 GU, CXU. *PE
MACK TRUCK: DUE TO OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAIN OIL GALLERY PRESSURE SENSOR OR PISTON COOLING JET...
Read full bulletin
PRESSURE SENSOR HAS FAILED AND NEW ANTI WICKING JUMPER HARNESS IS AVAILABLE TO STOP OIL FROM WICKING BACK AND CAUSING DAMAGE TO NEW SENSOR. MODEL CHU, CXU, GU, LEU, MRU, TD. *PE
MACK: UNDER CERTAIN CONDITIONS, HIGHER THAN EXPECTED TURBOCHARGER WHEEL SPEED, UNEVEN ENGINE SPEED, LOW T2...
Read full bulletin
TEMPERATURES, HIGH ENGINE LOAD, MAY HAVE REGENERATION SERVICE FAILURES. MODEL CXU, GU. NO YEARS LISTED. *PE
MACK TRUCKS: UNDER CERTAIN CONDITIONS, SOME TRUCKS MAY HAVE EXPERIENCE REGENERATION SERVICE FAILURES, THAT INCLUDE...
Read full bulletin
HIGHER TURBOCHARGER WHEEL SPEED, HIGHER BOOST PRESSURE, HIGH ENGINE LOAD, UNEVEN ENGINE SPEED AND LOW T2 TEMPERATURES ON ENGINES. MODEL 2011-2013 CXU, GU. *PE
MACK: ON SOME TRUCKS, OIL CONTAMINATION INTO ENGINE WIRE HARNESS, MAY BE FROM OIL LEVEL SENSOR FAILURE AND AN ANTI...
Read full bulletin
WICKING PIGTAIL SPLICE KIT IS AVAILABLE. MODEL CHU, CXU, GU, LEU, MRU, TD. NO YEARS LISTED. *PE
MACK TRUCKS:DUE TO EXCESSIVE MOISTURE IN THE CLIMATE UNIT, SOME VEHICLES MAY DEVELOP A BLOWER MOTOR FAILURE.
Read full bulletin
*JS
MACK TRUCK: REGARDING THE BREAKING OR CRACKING, AT STARTER SOLENOID STUD, OF 90 DEGREE POSITIVE BATTERY CABLE LUG; THE...
Read full bulletin
LUG WAS BENT AT TIME OF ASSEMBLY, AND ENGINE VIBRATES, CAUSING TERMINATION OF TERMINAL TO WEAKEN. MODELS CXU, GU. MODEL YEARS NOT LISTED. *PE UPDATED 1/24/2014 *JS
MACK TRUCK: DIAGNOSTIC TROUBLE CODE (DTC) INDICATES AN OPEN THERMOSTAT AND COOLANT SYSTEM NOT OPERATING CORRECTLY;...
Read full bulletin
DURING SEVERE WEATHER AND HEAVY DUTY APPLICATIONS WOULD DISPLAY, DURING ENGINE WARM UP AND INDICATE AN ISSUE WHEN THE COOLING SYSTEM IS PERFORMING NORMALLY, RESULTING IN UNNECESSARY REPLACEMENT OF COOLANT THERMOSTAT. MODELS CHU, CXU, GU, TD, MP7, MP10. *PE
MACK TRUCK: INFORMATION PROVIDED REGARDING MODIFICATION OF EGR VALVE ON ENGINES AND REMOVAL OF POPPET SHAFT END CAP O RINGS.
Read full bulletin
MODELS CHU, CXU, GU, LEU, MRU. NO MODEL YEARS LISTED. *PE
MACK: RELOCATING VGT ACTUATOR CONNECTOR AND MOUNTING ARRANGEMENT TO ELIMINATE DIAGNOSTIC TROUBLE CODES (DTCS) AND...
Read full bulletin
SIGNAL MISSING FROM ENGINE VARIABLE GEOMETRY TURBOCHARGER ACTUATOR (ENGINE VGT ACTUATOR) CAUSING FRETTING OF CONNECTOR PINS. *PE
MACK TRUCKS: EGR DIFFERENTIAL PRESSURE SENSOR PIN FRETTING.
Read full bulletin
SEVERE FRETTING DAMAGE OF THE ENGINE EXHAUST GAS RECIRCULATION DIFFERENTIAL PRESSURE SENSOR'S (EGR DIFFERENTIAL PRESSURE SENSOR) CONNECTOR MAY CAUSE AN UNRELIABLE SIGNAL TO THE SENSOR ON MACK MP8 EPA2007 ENGINES. *JS
MACK TRUCKS: ENGINE TUBOCHARGER COMPRESSOR BYPASS VALVE, AIRLINE ROUTING.
Read full bulletin
THIS DOCUMENT COVERS THE PROCEDURE FOR ROUTING THE FLEXIBLE AIR LINE AROUND THE FRONT OF THE ENGINE IF THE EXISTING STEEL AIR LINE FAIL. *JS
MACK TRUCK: INFORMATION REGARDING THE SLEEPER CAB SUSPENSION LEVELING VALVE BRACKET THAT WAS INSTALLED INCORRECTLY.
Read full bulletin
ALSO, THE SUPPORT BRACKET FOR AIR SPRING, INCORRECTLY MOUNTED ON FRAME, CAUSING CAB SHOCK TO EXTEND FULLY WHEN AIR SPRING IS INFLATED. *PE
MACK: DUE TO FRETTING OF CONNECTOR PINS IN ENGINE VGT ACTUATOR CONNECTOR, A NEW MOUNTING ARRANGEMENT HAS BEEN...
Read full bulletin
DEVELOPED AND RELOCATION OF ENGINE VGT ACTUATOR CONNECTOR. MODELS CHU, CXU, GU, MRU, MP8. *PE UPDATED 7/31/12. *PE
MACK: AN UNRELIABLE SIGNAL TO ENGINE VGT ACTUATOR FROM ENGINE VARIABLE GEOMETRY TURBOCHARGER (VGT) ACTUATOR HARNESS...
Read full bulletin
THAT HAS SEVERE FRETTING DAMAGE, THE CONNECTOR PIN AND SOCKET CONTACTS SHOULD BE REPLACED. *PE UPDATED 9/17/12. *PE
MACK TRUCKS: SEVERE FRETTING DAMAGE OF THE ENGINE VARIABLE GEOMETRY TURBOCHARGER ACTUATOR (ENGINE VGT ACTUATOR) HARNESS...
Read full bulletin
AND TURBINE SHAFT SPEED SENSOR (TSS) CONNECTORS MAY CAUSE AN UNRELIABLE SIGNAL TO THE ENGINE VGT ACTUATOR. ALSO INCLUDED MODEL CMM AND CMH. NO MODEL YEARS GIVEN. *JS
MACK TRUCK: EXPANSION TANKS MAY HAVE PERSISTENT COOLANT LEAKS THAT REQUIRES INSPECTION.
Read full bulletin
EXAMINE EXPANSION TANK FOR BURN HOLE/MARK UNDER PRESSURE CAP THAT ENABLES HOT COOLANT TO ENTER EXPANSION AREA. MODELS CHU, CXU, GU AND TD. *PE
MACK TRUCK: BETWEEN AFTERTREATMENT HYDROCARBON DOSING MODULE INITIAL DESIGN AND BOSS ON MP8 ENGINE, AN INTERFERENCE WAS DISCOVERED.
Read full bulletin
IT PREVENTS BRACKET AND AFTERTREATMENT HYDROCARBON DOSING MODULE FROM MOUNTING FLUSH TO SURFACE OF ENGINE BLOCK. *PE
MACK TRUCKS: THERE ARE ENGINE ECM SOFTWARE UPDATES.
Read full bulletin
*RM
MACK TRUCKS: IF THERE IS A FAILED OUTER VALVE SPRING THERE IS A REPLACEMENT PROCEDURE.
Read full bulletin
*RM
MACK: THERE ARE ENGINE DIAGNOSTIC TROUBLE CODES AND THERE MAY NEED TO BE A SOFTWARE UPDATE.
Read full bulletin
*RM
Fuel System
31 bulletinsIf oil dilution is suspected refer to the applicable CBR solution below: CBR-659Mack Chassis - Oil Diluted With Fuel;...
Read full bulletin
Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
Mack DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions
Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions.
DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions.
Premium Tech Tool (PTT) - Message For Data Mismatch, Product Configuration Mismatch; Instruction To Run An Accessory Kit...
Read full bulletin
Displayed When Attempting To Run Diagnostics For Diagnostic Trouble Codes (DTC) Or Programming - US10+OBD13 And Newer Emissions,
DEF Pump Troubleshooting Guide - US10+OBD13 And Newer Emissions
Selective Catalytic Reduction (SCR) Muffler Troubleshooting Guide - US10+OBD13 And Newer Emissions
USE FOR NEW VEHICLES (US21+OBD22 Emissions) - Intermittent Diagnostic Trouble Codes U02A3, U029D, U029E
Mack Chassis - Diesel Exhaust Fluid ( DEF ) System Cleaning/Flush After DEF Pump Failure Or System Contamination
Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions
Regen Fails to Start/Initiate Or Starts And Immediately Stops - US10 And US10+OBD13 Emissions
System Date And Time, Information; Diagnostic Tool ( J-Pro, Premium Tech Tool ( PTT ) ) Displays Incorrect Timestamp For...
Read full bulletin
Diagnostic Trouble Code ( DTC ) / Fault Code Occurrences, Possible Data Link Codes Present - US07 And Newer Emissions, Common Mod
Diagnostic Trouble Code (DTC) P04DB - Crankcase Ventilation Disconnected; US10+OBD13 To US14+OBD16 Emissions
Aftertreatment Hydrocarbon Injector (AHI) Troubleshooting Guide - US10+OBD13 And Newer Emissions
Volvo Chassis - Diesel Exhaust Fluid ( DEF ) Contamination In Fuel System, Inspection And Repair - US10 to US14 (...
Read full bulletin
Non-Common Rail Fuel System )
Volvo Chassis - Diagnostic Trouble Code (DTC) SA 0 FMI 0 or SPN 0 FMI 0 Present On Fault Code Readout - US10 And Newer...
Read full bulletin
Emissions, Model Year 2011 And Newer
Mack Chassis - Where To Find The Body Builder Portal - Body Builder Manual ( BBM ) Information - US04 And Newer...
Read full bulletin
Emissions, Model Year 2008 And Newer
Diesel Fuel Information - Acceptable Biodiesel, Fuel Blend For Summer And Winter - US07 And Newer Emissions, Model Year...
Read full bulletin
2008 And Newer
Mack Chassis - Disabling The Driver ID; Removing the Driver ID Prompt - US07 To US14+OBD16 Emissions, Model Years 2008...
Read full bulletin
To 2017
Mack Chassis - Diagnsotic Trouble Code P026D-00, Fuel Injection Quantity Higher Than Expected; Diagnosis And Information...
Read full bulletin
- US14+OBD15 Emissions, Model Year 2016
Fuel Tank Strap Insulator Design Update; Fuel Tank Strap Appearance Changed
Aftertreatment Hydrocarbon Injector (AHI, 7th Injector) Changes Between US10 And US17 (GHG17, Common Rail Fuel System) -...
Read full bulletin
Chassis Experiencing High soot Accumulation, Abnormal ( Too High, Overtemp, Too Low ) Regeneration Temperatures Following An Aftertreatment Hydrocarbon Injector Nozzle Replacement Procedure
Diagnostic Trouble Code ( DTC ) P02FA Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
Diagnostic Trouble Code ( DTC ) P0471 Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
Diagnostic Trouble Code ( DTC ) P0420 Illuminating The Malfunction Indicator Lamp (MIL) - US17 (GHG17, Common Rail Fuel...
Read full bulletin
System) Chassis ONLY
MACK TRUCK: TO INCREASED PROTECTION AGAINST FUEL INJECTOR TIP EROSION, A NEW FUEL TANK VENTILATION FILTER WAS...
Read full bulletin
IMPLEMENTED, AND MOUNTS ON OUTSIDE OF FRAME RAIL, USING FUEL TANK J BRACKET HUCK FASTENERS. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCK: MOUNTED OUTSIDE OF FRAME RAIL, IS NEW FUEL TANK VENTILATION FILTER MOUNTING SLEEVE, USING FUEL TANK J...
Read full bulletin
BRACKET HUCK FASTENERS AND TO INCREASE PROTECTION AGAINST FUEL INJECTOR TIP EROSION. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCK: AFTERTREATMENT DIESEL PARTICULATE FILTER (DPF) INLET PIPE MAY POSSIBLY EXHIBIT AN EXHAUST LEAK.
Read full bulletin
TO IMPROVE SEALING FUNCTION OF DPF INLET PIPE, THE DPF INLET PIPE FLANGE WAS MODIFIED. MODEL GU. MODEL YEARS 2011-12. *PE
MACK: ON THE RIGHT SIDE OF TRUCK, IS THE MOUNTED STANCHION EXHAUST BRACKET AND FUEL VENT LINES, WHICH THE FUEL TANK VENTILATION FILTER IS ADDED.
Read full bulletin
MODELS CHU, CXU, GU, TD, MP7, MP8, MP10, US07, US10. MODEL YEARS 2008-2012. *PE
MACK: THE AFTERTREATMENT DIESEL EXHAUST FLUID (DEF) TANK FILLER NECK IS BEING REPLACED WITH AN IMPROVED FILLER NECK .
Read full bulletin
*PE UPDATED 5/11/12. *PE
MACK TRUCKS: ON CERTAIN TRUCKS (CHU, CXU GU TD), ALL AFTERTREATMENT DIESEL EXHAUST FLUID (DEF) COOLANT HOSES ARE TO BE REPLACED.
Read full bulletin
*PE
Other
28 bulletinsCBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR - Mack Carrier Nut Adhesive Change.
CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication...
Read full bulletin
but failing to transmit GPS location data.
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
CBR -Telematics Gateway (TGW) Connect Ability Issues
Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers.
Read full bulletin
The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft.
Air Restriction Indicator
CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19
Vibration Diagnostics
Frame Flange Relief Cut-out Templates with 105 millimeter Frame Flanges
New Vehicle Safety Certification Requirements for Vehicles, U.S.
Read full bulletin
and Canada
CBR: Mack Granite - Diagnostic Trouble Code (DTC) P208464
2007 document reformatted to be published as a TSB in Impact.
Read full bulletin
Lateral cab movement bracket.
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Axle Carrier Pinion Angles
Premium Tech Tool ( PTT ) Training Materials And Support Tools
DEF Pump Cycling periodically Hours After Key Off
Mack - PTO Pump Speed Calculator
(Back Office Only) Mack Chassis - Cruise Control Inoperative After Disabling The Electronic Stability Program (ESP)
Volvo Chassis - FSB 237 - 020, Unit Injector Yoke Hold - Down Bolt Torque Specification
Mack Chassis - FSB 563-008 Plugs, Pressure Protection Manifold - New Brass Plugs For Noregon Pressure Protection...
Read full bulletin
Manifold (PPM)
Mack Chassis - FSB 237 - 020, Unit Injector Yoke Hold - Down Bolt Torque Specification
Diagnostic Trouble Codes (DTC) P20EE And P103C, Diagnostic Procedure; REPLACES GUIDED DIAGNOSTICS IN PREMIUM TECH TOOL (...
Read full bulletin
PTT ) - US17+OBD16 And Newer Chassis ONLY
Mack Chassis - Fault Code SID 158 FMI 0 Logging In Instrument Cluster ( MID 140, IC ), No Code Description Or Diagnostic...
Read full bulletin
Information
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
MACK TRUCKS: LOW OIL PRESSURE.
Read full bulletin
STORED DTC SPN 100 FMI 1, DURING LONG HARD PULL CONDITIONS. *JS
MACK TRUCK: ON CERTAIN TRUCKS, THERE IS A LOSS OF SPEED (LOW) ASSIST.
Read full bulletin
THE PUMP FLOW AND PRESSURE MUST BE TESTED BEFORE REPLACING TANDEM PUMP ASSEMBLY. *PE
MACK TRUCKS: THE DIAGNOSTIC CONNECTOR MAY BECOME LOOSE.
Read full bulletin
INFORMATION ON REPLACEMENT OF THE DIAGNOSTIC RETAINER CLIP. *RM
Electrical
22 bulletinsCBR: Mack NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
Mack MMD Alternator Pulley
NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions.
(Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP).
Sensor And Parameter Value Monitor - Template Parameter List For Pre-OBD (9-Pin Diagnostic Connector) Chassis In Premium...
Read full bulletin
Tech Tool ( PTT ); Regeneration And Road Test Sensor Monitor Parameters - US07 And US10 Emissions, Model Years 2008 To 2013
No Start Condition After Over The Air Programing - VECU5 No Start "Safe State"
Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer
Low Voltage Disconnect (LVD), Function Description
NOx Sensor Troubleshooting Guide - US10+OBD13 And Newer Emissions
Aftertreatment Control Module ( ACM ) Diagnostic Trouble Codes ( DTC ) U0001-88 and U0010-88 Lighting The Malfunction...
Read full bulletin
Indicator Lamp ( MIL ); Possible Derate Warning US10 And Newer Chassis
Intake Pre-heater Electrical Schematics (Diagrams) - US10+OBD13, US14+OBD13 To US14+OBD16 Emissions
Lighting Control Module ( LCM ) Replacement - Refer To Technical Parts Information ( TPI ) 364 - 034 Control Unit
Aftertreatment Control Module (ACM) Offline/Not Visible/Missing From Control Unit Information in Premium Tech Tool (PTT)...
Read full bulletin
- US10+OBD13 And Newer Emissions
Exhaust Gas Recirculation (EGR) System - Fault Codes SPN 412 FMI 0,2,5; Diagnostic Trouble Codes (DTC) P040A, P040B,...
Read full bulletin
P1121 - Temperature Sensor Inspection
ECM and ACM Reprogramming, OBD2015
MACK: WHEN THE OUTPUT FROM THE VECU GETS SHORTED OUT TO GND, THERE IS NO WARNING AND CAUSES 5TH WHEEL TO SLIDE WITHOUT...
Read full bulletin
ACTIVATING 5TH WHEEL SLIDE SWITCH AND NEEDS TO BE REPROGRAM. MODEL 2010-2014 CHU, CXU, GU, TD. *PE
MACK TRUCKS: IMPROVEMENT WAS MADE FOR PROTECTION FOR STACKABLE BATTERIES FROM ENVIRONMENT TO PREVENT PREMATURE BATTERY...
Read full bulletin
CORROSION WITHIN THE BATTERY BOX. MODEL 2010-2013 GU. *PE
MACK TRUCK: TORQUE ISSUE AND MATERIAL MAY BE CAUSING BATTERY CABLE CLAMPS TO CRACK OR BREAK.
Read full bulletin
TRUCK NEEDS TO BE INSPECTED TO DETERMINE HOW MANY CLAMPS ARE CRACKED OR BROKEN. MODEL 2010-2012 CHU, CXU, GU, LEU, MRU, TD. *PE
MARCK TRUCK: INFORMATION REGARDING TWO UPPER HUCK BOLTS FOR FUEL TANK J BRACKET AND AFTERTREATMENT CONTROL MODULE (ACM).
Read full bulletin
TO PROVIDE NECESSARY CLEARANCE, IF INTERFERENCE EXISTS, CUT OFF END OF HUCK BOLTS AND REMOVE ACM. MODELS GU. NO MODEL YEARS LISTED. *PE
MACK TRUCK: DUE TO VEHICLE ELECTRONIC CONTROL UNIT (VECU) OUTPUT WIRE PT02, THE CIRCUIT CB7A IS IN WRONG CAVITY...
Read full bulletin
LOCATION, CAUSING PT02 (POWER TAKE OFF) FUNCTION NOT WORKING CORRECTLY. *PE
MACK: ON CERTAIN MACK VEHICLES BUILT BEFORE 2/13/2012, THE FRONT CHASSIS TO UREA TANK CONNECTION, LOCATED ON THE SIDE OF...
Read full bulletin
THE DEF TANK MAY RUB MOUNTING BRACKET OR NOT STAY SECURED. *JS
MACK TRUCKS: THE FUSE IDENTIFICATION DECAL IS BEING CORRECTED.
Read full bulletin
*RM
Transmission
20 bulletinsCBR: Mack chassis with an mDRIVE transmission, there have been reports of complete shift assemblies and TECUs being...
Read full bulletin
replaced due to technicians being unable to pinpoint the source of the air leak.
CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Air-Operated Clutch Assist Adjustment and Troubleshooting
Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim...
Read full bulletin
For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N.
Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault...
Read full bulletin
Codes P1058 - 21 Or MID 130 PID 161 FMI 1
Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool (...
Read full bulletin
PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed
Automated Manual Transmission (AMT) (Spigot Bearing) Input Shaft Repair Kit And Shim Kit, Part Number Information,...
Read full bulletin
Reference Guide - US07 And Newer Emissions, Model Year 2008 And Newer
Mack Chassis - Equipped With An Automated Manual Transmission (mDrive, AMT) AMT-C, AMT-D Or AMT-F - Transmission Oil...
Read full bulletin
Specifications - Model Years 2010 To 2020
Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92...
Read full bulletin
Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
Transmission Oil Cooler Hose, Replacement
Mack Chassis - Equipped With An Allison Transmission: Enable 6th Speed - All Emissions, All Model Years
Automated Manual Transmission Gearbox Will Not Shift To High Range After Gearbox Repair; MID 130 PSID 24 FMI 1, P1072-92...
Read full bulletin
Unintentional Disengagement Of High Range - US07 And Newer Emissions, Model Year 2008 And Newer
MACK: ON SOME TRUCKS, MORE LEG AND KNEE ROOM WAS PROVIDED FOR OPERATOR COMFORT DUE TO AIR OPERATED CLUTCH ASSIST SYSTEM...
Read full bulletin
DESIGNED TO REDUCE CLUTCH PEDAL EFFORT BY 20% AND CLUTCH PEDAL TRAVEL BY 2' (50.8MM). MODEL CHU, CTP, CXP, CXU, GU. NO YEARS LISTED. *PE
MACK: DUE TO SUPPLIER MANUFACTURING ISSUE WITH CONNECTOR, SOME TRUCKS MAY EXPERIENCE MULTIPLE OPEN CIRCUITS IN 31 WAY...
Read full bulletin
TRANSMISSION CONNECTOR AND WOULD TO BE INSPECTED AND IF NEEDED, REPAIRED AND REPLACED. MODEL 2011-2013 CHU, CXU, GU, TD. *PE
MACK TRUCKS: THE AIR ASSISTED CLUTCH CABLE ON SOME VEHICLES MAY FRAY AT THE CLEVIS.
Read full bulletin
*JS
MACK: CERTAIN TRUCKS HAD O RING INSTALLED INCORRECTLY ON TRANSMISSION COOLER LINE FITTINGS DURING ASSEMBLY, THEREBY...
Read full bulletin
CAUSING FLUID FROM TRANSMISSION TO BE LOSS AND/OR DAMAGE TO TRANSMISSION, PREMATURELY. *PE UPDATED 7/31/12. *PE
MACK TRUCK: ON CERTAIN TRUCK CHASSIS, THERE MAY BE POSSIBLE DAMAGE TO COMPONENTS CAUSE BY LOOSENING OF THE JOINT AND...
Read full bulletin
NOISE DURING OPERATION, ON THE BULL GEAR MOUNTING BOLTS. *PE
MACK: CLUTCH OPERATION ERROR PREVENTS STARTER ENGAGEMENT UNLESS PEDAL IS FULLY DEPRESSED.
Read full bulletin
*RM
MACK: THERE ARE NEW BULL GEAR MOUNTING FASTENER TORQUE PROCEDURES.
Read full bulletin
*RM UPDATED 2/21/12. *PE
MACK TRUCKS: THE CLUTCH PEDAL CAN RUB AGAINS THE ANTI-LOCK BRAKE HARNESS CAUSING THE MALFUNCTION LIGHT TO GO ON.
Read full bulletin
*RM
Brakes
7 bulletinsCBR - Active "Set Park Brake" Message On Drivers Information Display (DID).
(Back Office) Mack Chassis - Grade Gripper Reactivates After Timeout With Brake Pedal Released - Vehicles Manufactured...
Read full bulletin
Prior To 2018
MACK: THE PROTRUSION OF BRAKE SHOES BEYOND BRAKE DRUM IS BEING REPLACED WITH NEW 152MM (6.0 IN) BRAKES SHOES, 178 MM...
Read full bulletin
(7.,0 IN) WIDE BRAKE DRUMS ON SOME TRUCKS. MODEL 2011-2014 CHU, CXU, GU, TD. *PE
MACK: BRAKE SHOES PROTRUDES BEYOND BRAKE DRUM AND CAN BE RESOLVED BY INSTALLING BRAKE SHOES 152MM (6.0 IN) AND WIDE BRAKE DRUMS 18MM (7.0 IN).
Read full bulletin
MODEL 2011-2014 CHU, CXU, GU, TD. *PE
MACK: AIR DISC BRAKE EXPERIENCING THERMAL OVERLOAD CONDITION THAT OVER ADJUSTMENT OF NORMAL PAD WEAR COMPENSATION THAT...
Read full bulletin
MAINTAINS RUNNING CLEARANCE BETWEEN BRAKE PAD AND ROTOR AND REDUCES RUNNING CLEARANCE BELOW DESIRED LEVEL. MODEL CHU, CXU, GU, LEU, MRU, TD. NO YEARS LISTED. *PE
MACK TRUCKS: INFORMATION ON REPLACEMENT PROCEDURES FOR THE SLACK ADJUSTER CONTROL ARM AND SUSPENSION SHOCK ABSORBER...
Read full bulletin
INTERFERENCE ON REAR/REAR DRIVE AXLE. MODEL GU. NO MODEL YEARS LISTED. *PE
MACK TRUCKS: FOUR WAY FLASHER ABS FAULT.
Read full bulletin
CERTAIN VEHICLES EQUIPPED WITH A WEBB SOLID STATE FLASHER, BUILT FROM JAN. 1, 2010 TO JUNE 29, 2012 MAY EXPERIENCE AN ACTIVE ABS FAULT WHEN THE 4 WAY FLASHER IS ENABLED. *JS
Body & Paint
7 bulletinsMack Chassis - Granite 7 Series (GU, GU7, M058, M746, M748) - Cracks, Breakage Or Fatigue Found Around The Hood Guide -...
Read full bulletin
Vehicles Built From Feb 2010 Through 20 Nov 2017
Mack Chassis - Model GR/GU - Hood Warpage
Mack Chassis - Model GR/GU - Hood Warpage
Mack Chassis - Model GR/GU - Hood Warpage
Mack Chassis - SNM16 - 015 Updated Wiper Mechanism for One Piece Windshield; Windshield Wipers Leaving Streaks Or Not...
Read full bulletin
Clearing Center Of Windshield
Hood Insulation Separating From Hood, Insulation Installation Instructions
MACK: THE DOOR STOP BRACKET WILL FAIL, ON SOME TRUCKS, DUE TO AN OVER EXTENSION OF DOOR, BUT A NEW DOOR DESIGN ASSEMBLY IS AVAILABLE.
Read full bulletin
MODEL CHU, CXU, GU, TD. NO YEARS LISTED. *PE
Suspension
6 bulletinsElectronically Controlled Suspension (ECS) Losing Air Pressure
Mack Chassis - Front Hub With Unit-Bearings ( Unitized Wheel Bearings ), Inspection Information And Guidelines -...
Read full bulletin
Commonly Model Year 2008 And Newer
MACK TRUCKS: REAR SUSPENSION HARDWARE TORQUE.
Read full bulletin
BOLTS ARE LOOSE OR INCORRECTLY TORQUED ON THE PRIMAAX SUSPENSION. *JS UPDATED 07/18/2013 *JS
MACK TRUCKS: REAR SUSPENSION ADJUSTMENT WASHERS.
Read full bulletin
REPLACEMENT OF THE SUSPENSION ADJUSTMENT WASHERS IS REQUIRED. *JS
MACK TRUCKS: SLACK ADJUSTER CONTROL ARM.
Read full bulletin
HALDEX SLACK ADJUSTERS AND RIDEWELL SUSPENSION MAY EXHIBIT A CONDITION WHICH ALLOWS THE SLACK ADJUSTER CONTROL ARM TO MAKE CONTACT WITH THE RIDEWELL SUSPENSION WALKING BEAM DURING STEEP SUSPENSION ARTICULATION. *JS UPDATED 06/28/13. *PE UPDATED 12/19/13. *PE UPDATED 08/09/2014 *JS
MACK: DURING EXTREME DOWNWARD ARTICULATION OF REAR AXLE, THE AIR SPRING MAY SEPARATE AT MOUNTING BELL.
Read full bulletin
*PE
Lighting
5 bulletinsCBR: The procedure to eliminate the Mack Chassis "Air Restriction Light On" seen in the cluster is to confirm that the...
Read full bulletin
parameter YYT is set to "Enable" with Premium Tech Tool.
Mack Chassis - No Gauge Cluster Backlight
TSB-Charge Air Cooler t-clamp install.
MACK TRUCKS: NEW SWITCH MOUNTING BRACKET WAS DEVELOPED TO REPLACE EXISTING TURN SIGNAL SWITCH MOUNTING BRACKET, DUE TO...
Read full bulletin
CONTACT BETWEEN SWITCH FINGERS AND SLEEPING SHAFT, THAT CAUSED SWITCH OPERATION TO IMPROPERLY CANCELS ITSELF. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCK: THE SUPPORT BRACKETS, USED WITH WIDE BASE WHEEL/TIRE COMBINATIONS EQUIPMENT, PROVIDE ADDITIONAL STRENGTH...
Read full bulletin
THAT IS REQUIRED WITH LONGER CAM TUBES, WERE NOT INSTALLED AT FACTORY, AND NEED TO BE REPLACED. MODELS CHU, CXU, GU. NO MODEL YEARS LISTED. *PE
Software & Calibration
5 bulletinsMack Chassis - Bendix Vendor Configuration Program ( VCP ) Software Download Information
MACK TRUCK: FLASHERS ARE TO BE REMOVED DUE TO DURABILITY ISSUES.
Read full bulletin
*JS
MACK: TORQUE ROD REPLACEMENT ON FRONT REAR AXLE.
Read full bulletin
*JS UPDATED 5/9/12. *PE
MACK TRUCKS: THERE ARE CRACKS IN A STEEL OIL TUBE THAT CAN LEAD TO LEAKING.
Read full bulletin
*RM UPDATED 2/21/12. *PE
MACK: FAN RINGS ARE CRACKING DURING EXTREME SERVICE.
Read full bulletin
*RM UPDATED 9/7/11. *PE
Pre-Delivery & Maintenance
4 bulletinsCBR - Accelerator Pedal: Inspection Instructions
Service Literature Published and Released in May, 2023
CBR: eWarranty To UCHP Labor Code ( SCC Code ) Crossover, Conversion Information For Use With Campaigns ( FI, PI ) And...
Read full bulletin
Recalls ( EC, SC ), Location On Trucks Dealer Portal ( TDP )
Stock Vehicle Storage and Maintenance
Tires & Wheels
3 bulletins2009 Document reformatted to be published as a TSB in Impact.
Read full bulletin
Axle Alignment Specifications
MACK TRUCK: THE GRADE GRIPPER FEATURE, ON SOME TRUCKS, ARE PRONE TO HARSH ENVIRONMENTS WITH INTERNAL CONTAMINATION,...
Read full bulletin
CAUSED BY BUILD UP OF GRIME, SALT, ROAD DEBRIS AND OTHER CONTAMINANTS. MODEL CHU, CXU, GU, TD. *PE
MACK TRUCKS: OIL SEEPAGE AT FLYWHEEL HOUSING.
Read full bulletin
THIS PROBLEM HAS ALREADY BEEN SOLVED IN PRODUCTION, BUT THE PRODUCTION SOLUTION IS NOT COMPATIBLE WITH PREVIOUS GENERATION FLYWHEEL HOUSINGS. *JS
Steering
1 bulletinMack Chassis - Models GU / CHU Steering Wander
HVAC & Climate
1 bulletinMACK: FITTINGS FOR CURRENT AIR COMPRESSOR COOLANT HOSES ARE NOT THE SAME SIZE AT EACH END AND INCOMPATIBILITY OF HOSE...
Read full bulletin
INSIDE DIAMETER AND COMPRESSOR FITTING SIZE CAUSED COMPRESSOR HOSES TO COME LOOSE OR BLOW OUT AIR COMPRESSOR FITTINGS. MODEL 2009-2013 GU7, GU8, MP8. *PE