2026 GMC Sierra 2500 TSBs
171 Technical Service Bulletins across 13 categories
Categories
Infotainment
50 bulletinsThis Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers a procedure to reset the radio.
This PI is created to inform GM dealers that some vehicles may intermittently fail to connect wireless Apple CarPlay or...
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Android Auto after Bluetooth pairing during the first key cycle. The condition is caused by a software anomaly.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and...
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how to reset/clear the message.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers a procedure to reset the radio.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers a procedure to reset the radio.
This Preliminary information communicates to dealers steps to follow to recover an IOK radio.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers a procedure to reset the radio.
This Preliminary information communicates to dealers a procedure to reset the radio.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back...
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to the vehicle.
This Preliminary information communicates to dealer to contact TAC for a specific display issue.
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back...
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to the vehicle.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back...
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to the vehicle.
This Preliminary information communicates to dealers a procedure to reset the radio.
Improvements to audio system performance.
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Fixes to help ensure proper functionality for the center display. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to recover an IOK radio.
This Preliminary information communicates to dealers steps to follow to recover an IOK radio.
This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back...
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to the vehicle.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC...
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display
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
This Preliminary Information communicates direction for different audio issues with RPO UQA, UQF, UQS, or NKD
This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
GM Update N25-F163BU This update contains a required software change to help improve the overall software update and diagnostics process.
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Be sure to install this update to be able to receive future software updates. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and...
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how to reset/clear the message.
Other
31 bulletinsThis preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements.
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They should follow the notes mentioned prior to anything being replaced.
This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with...
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the image processor #2 and how to restore communication
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
This PI provides diagnostic steps for dealer technicians to verify the condition and ensure that part replacement is...
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necessary
This Preliminary information communicates recovery procedure after return to dealer message.
This Preliminary information communicates recovery procedure after return to dealer message.
This PI states that if SDGM DTC U3000 Sym 49 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM.
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Advises of how to contact PQC to authorize SDGM replacement.
Pi created to provide GM dealers with information on gathering information for projection issue
This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PI created to provide dealer technicians with procedures for updating Google Maps.
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical...
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Assistance Case in CX Connect.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
Certain vehicles listed above, may have a condition where the trailer hitch label understates hitch capability.
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Dealers will remove the sticker on trailer hitch.
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements.
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They should follow the notes mentioned prior to anything being replaced.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements.
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They should follow the notes mentioned prior to anything being replaced.
This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements.
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They should follow the notes mentioned prior to anything being replaced.
New Vehicle Monitoring Programs Section in IVH
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This Preliminary information communicates an issue with super cruise unavailable due to the driver's monitoring camera...
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and dealers to replace the camera.
This Preliminary Information communication provides information to the technician about vehicles that may have a bump...
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feel or clunk noise at a stop or on launch. Dealer should communicate to the customer this condition is a normal operating characteristic
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini...
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50 terminal test probe, replacement terminals, and terminated leads.
This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
This Preliminary information communicates a diagnostic tip on how to resolve a issue if the serial data authentication...
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configuration did not complete correctly.
This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini...
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50 terminal test probe, replacement terminals, and terminated leads.
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini...
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50 terminal test probe, replacement terminals, and terminated leads.
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini...
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50 terminal test probe, replacement terminals, and terminated leads.
This Preliminary Information communication provides information to the technician about the use of J-35616-64B and Mini...
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50 terminal test probe, replacement terminals, and terminated leads.
Engine
28 bulletinsThis Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently...
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investigating.
This Preliminary information communicates that Engineering is working on a resolution and no parts should be replaced at...
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this time.
This preliminary information communicates an issue with a service column lock message and DTC U3000.
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Engineering is working on the issue and in the meantime dealerships are to reset/clear the DTC and perform four sleep cycles to verify the DTC does not return.
This PI is created to inform GM dealers that some vehicles may intermittently fail to connect wireless Apple CarPlay or...
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Android Auto after Bluetooth pairing during the first key cycle. The condition is caused by a software anomaly. Do not replace parts. Engineering is investigating the root cause; customers may continue to drive the vehicle. This PI will be updated or replaced by a TSB once a resolution is determined.
Customer Satisfaction Program.
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Certain vehicles listed above may have a condition in which the oil galley in the cylinder head was not drilled properly. Dealers are to perform the inspection procedure contained within this bulletin.
This Preliminary Information (PI) relays to dealer technicians to replace the engine and turbocharger if there is a lack...
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of lubrication to the rocker arms or rocker arm components.
This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently...
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investigating.
The purpose of this PI is to inform dealer technicians of a normal cab pressure relief valve noise to avoid unnecessary...
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part replacement
This Preliminary information communicates information on a hydraulic rush type noise from the power steering gear.
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This noise is a characteristic of the new Active Hydraulic Assist System RPO NV8 and no repairs should be made. The noise is most noticeable in the cab at idle, in park, with all accessories turned off.
This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed.
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Engineering is working on a new HVAC door seal material to correct the noise.
Certain vehicles may have a condition in which the bolts for the transmission control valve body may be loose or missing.
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Dealers will retorque or replace the suspect valve body bolts.
This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on...
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part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.
This preliminary information is to inform technicians and customers that the voice command will be inoperative when trying to open applications.
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Engineering is investigating and this PI will be converted to a bulletin when a repair is available.
This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on...
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part restriction due to elevated replacement rates and ongoing engineering investigation. Technicians must not replace the front camera module unless they have: 1.Completed the diagnostic procedure in this PI, and 2.Contacted TAC and received authorization, including the SI document number and specific step that directs camera replacement.
This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does...
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not restart and to inspect the engine ground strap. Temporarily on hold while PIE0572 is active. PIE0572 has now ended and reinstating the PI.
This Preliminary information communicates an issue with the SES MIL and DTC P062B and engineering is currently...
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investigating.
This PI communicates information informing dealers that Engineering is aware of the clunk noise and is currently...
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investigating a root cause.
This Preliminary information communication provides information to the technician on installing Regular Production Option Code UVC Rearview Camera.
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Technician will need to reference the latest version of General Motors Up-fitter Integration Bulletin 152. The information can be found at http://www.gmupfitter.com/ under the "Technical Bulletin" Tab and then "Show all bulletins."
Certain vehicles may experience water intrusion due to a hole in the cabin Pressure Relief Valve.
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Dealers are to seal the hole using RTV sealant.
This Preliminary information communicates an issue with blower motor speed changing when air flow is blocked by snow.
This Preliminary information communicates that some customers may comment that after an auto-stop event the engine does...
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not restart and to inspect the engine ground strap. Temporarily on hold while PIE0572 is active. PIE0572 has now ended and reinstating the PI.
This update contains a required software change to help improve the overall software update and diagnostics process.
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Be sure to install this update to be able to receive future software updates. Improvements to help reduce check engine light activation and emissions system messages. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
This Preliminary information communicates an issues with the HVAC making a hum buzz noise when the blower is set to a higher speed.
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Engineering is working on a new HVAC door seal material to correct the noise.
This Preliminary Information communication provides information to the technician about vehicles that have had multiple...
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repair attempts that are being performed on customers vehicles that exhibit vibration conditions without utilizing the support of General Motors Technical Assistance Center. If valid vibration frequency or Road Force Variation data has been collected and a repair attempt does not correct the customer complaint, contact General Motors Technical Assistance Center for further support. For any vehicles that remains unrepaired after being at the dealer for three days or more and a related bulletin or PI is not found, contact General Motors Technical Assistance Center for further support.
Service Update. Certain vehicles listed above may have a condition which can cause the fuel pump power control module to fail.
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If this were to occur, fuel flow to the engine could be interrupted. Dealers will replace the fuel pump power control module.
This Preliminary Information communication provides information to the technician about fluid leaking from the brake...
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caliper piston area found during a service of the vehicle. The substance is actually excess assembly grease from the caliper boot and piston.
This preliminary information communicates an issue with an SES MIL and reduced power steering, and brake assist that...
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engineering is working on a fix.
This Preliminary information communicates information to inform dealer there is a check valve in the washer fluid hose...
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that connects to the washer pump.
Electrical
19 bulletinsAdditional protection for the health of your battery Updates to help prevent excessive battery drain and overheating ...
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Improvements to the software update system Improvements to reliability when extending the running boards on your vehicle
This PI was created to help avoid unnecessary front camera module replacements
This Preliminary information communicates an issue with a replace or low FOB battery message
This PI was created to help avoid unnecessary front camera module replacements
This Preliminary Information (PI) relays to dealer technicians to replace the powertrain control relay in the under hood...
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fuse relay center.
This PI was created to help avoid unnecessary front camera module replacements
This PI was created to help avoid unnecessary front camera module replacements
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no...
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DTC'ss
Certain vehicles, equipped with Snowplow Prep Package RPO VYU, may be missing an accessory harness.
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Dealers are to include the Auxiliary Wiring Harness in the accessory pack for vehicles in dealer stock. Vehicles NOT in dealer stock will have the Harness installed by the dealer.
This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication issue after an...
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event like a lightning strike, battery jump started backwards, failure over the air update, etc.
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no...
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DTC's
This PI Communicates information to inform technicians that PTO Configuration has moved from PTO Module to ECM.
This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
This Preliminary information communicates information to direct the dealer or upfitter to GM Upfitter Bulletin 203 for...
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information on installing the Universal Vehicle Module.
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no...
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DTC's
This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no...
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DTC's
The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
This Preliminary Information communication provides information to the technician about vehicles that have an...
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intermittent no crank, no start, or start stall concern with the security light coming on. Technician may find Diagnostic Trouble Codes B3055, B3060, B3935, C0750, C0755, C0760, C0765, and/or C0775.
This service bulletin provides information on the proper Reflective High Temperature Heat and/or Insulating Tape to use...
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for certain repairs, such as Wiring Harness Repairs.
Body & Paint
15 bulletinsThis preliminary information communicates a diagnostic tip for the tailgate release system and tailgate ajar message.
This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position...
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after curbview assist is used.
This PI provides information to repair the door water deflector which is not sealed properly allows water into the door...
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jam/sill area.
This Preliminary information communicates that the inner tailgate cannot be disabled if the vehicle is not equipped with...
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passive entry.
This Preliminary information communicates information on how to disable the Side Blind Zone Detection and Park Assist...
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systems when a customer removes the pickup box from the vehicle to install an aftermarket bed or body.
PI to explain normal operation for a concern that the outside rearview mirrors may not fold when the doors are locked,...
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due to the personalization settings for Auto Door Unlocking.
This Preliminary information communicates that the Tailgate Assist Handle is not included with certain truck models and...
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how to get one if needed.
This Preliminary information communicates information to direct to GM Upfitter bulletin 193 or 205 depending on trim...
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level for installation instructions for the 9L7 Upfitter Switches.
This PI Communications information on an alternative product dealers can use to perform 19-NA-255: Wax Coating on Frame...
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Peeling, Metal Shows Corrosion/Rusting due to issue with getting product from current supplier listed in the bulletin.
This Preliminary information communicates an issue with a service keyless entry message caused by aftermarket door...
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handle covers and they should be removed.
This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position...
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after curbview assist is used.
This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position...
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after curbview assist is used.
This Preliminary information communicates that the Tailgate Assist Handle is not included with certain truck models and...
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how to get one if needed.
This Preliminary information communicates a new tailgate feature which allows the customer to enable or disable the...
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inner tailgate.
This Preliminary information communicates a diagnostic tip on how to resolve a issue of the horn sounding when vehicle...
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doors are being closed and the key in vehicle reminder set to off.
Brakes
6 bulletinsThis PI provides diagnostic tips for diagnosing electric trailer brakes issues.
This PI advises dealers that if the K160 Brake System Control Module sets DTC P0606 along with P0562 and/or P25A2,...
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additional diagnostic aids should be followed before replacing parts. The PI provides guidance to inspect for low voltage conditions, wiring, terminal concerns, and module communication issues that may cause false or intermittent EBCM DTCs.
This PI provides diagnostic tips for diagnosing electric trailer brakes issues.
This Preliminary Information communication provides information to the technician about customers that may request the...
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factory Integrated Trailer Brake Controller Regular Production Option Code (JL1) be installed on their Full-Size Pickup or SUV when the vehicle was not ordered with the option. Dealer should advise the customer it cannot be added to the vehicle.
This service bulletin provides information for the technicians to use a Customer Concern Verification sheet to...
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facilitate the questions needing to be answered by the customer regarding Automatic Emergency Braking (AEB) issues.
This Preliminary information communicates an issue with the Hydrastar Electric Over Hydraulic trailer brake system...
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causing a voltage spike into the trucks electrical system which is causing DTC C1114 to set.
Fuel System
5 bulletinsImprovements to accuracy for Diesel Exhaust Fluid level shown in driver display.
This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and...
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advises of warranty direction.
This Preliminary information communicates the Heavy Fuel Usage message in the DIC is normal due to low fuel range and...
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current driving habits, or low fuel range and vehicle is idling.
This warranty administration bulletin provides policy information on vehicles outside of a California Emissions State...
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who move to and register their vehicle in a California Emission State may be entitled to the 7 year, 70,000-mile Emission Select State Component Limited Warranty.
This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be sent for...
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analysis.
Pre-Delivery & Maintenance
5 bulletinsThis service bulletin provides information to dealership personnel for new vehicles with less than 1,000 miles that may...
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not pass California smog inspection or smog inspection in other states.
This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector...
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Reconnect Labor Code Numbers.
This warranty administration bulletin provides policy information for GM courtesy transportation and roadside assistance...
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programs.
This warranty administration bulletin provides information for dealers/technicians on System Reset and Connector...
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Reconnect Labor Code Numbers.
The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential sources for...
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causing multiple customer concerns that do not have other diagnostic methods to identify them.
Tires & Wheels
4 bulletinsThis preliminary information communicates information about how to determine if a wheel and tires size change is...
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available.
This PI communicates information that the customers fifth wheel hitch may not latch into the factory box mounted hitch...
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due to a supplier quality concern. Dealer is to replace box mounted hitch to correct.
This Preliminary Information communication provides information to the technician that some owners of Heavy Duty Trucks...
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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.
This service bulletin provides information on Tire Sidewall Irregularities.
Transmission
3 bulletinsCertain vehicles may have received transmission mounting bolts that do not meet expected hardness specifications.
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Loose or failed bolts may result in hard shifting from the transmission and/or noise. Dealers will replace both transmission mounting bolts.
This PI communicates diagnostic information to assist Technicians with a possible transmission shudder
This Preliminary information communicates an issue with an aftermarket device wired into the vehicle and cause the...
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vehicle to turn off when shifted into gear. This PI provides a diagnostic tip to inform dealership to inspect for this aftermarket device.
Lighting
2 bulletinsThis preliminary information communicates an issue with aftermarket LED lighting causing false front park assist alerts...
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and dealers are to install the factory lighting before performing any in depth diagnostics.
Certain vehicles listed above may be equipped with a trailer hitch label that understates hitch capability.
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Because this label can easily be installed by the customer, and to reduce their inconvenience, the corrected label and installation instructions will be mailed to customers of record.
Air Bags & Safety
2 bulletinsThis Preliminary information communicates how the left lower corner of the DIC is dual purpose and when vehicle is first...
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started it displays the rear passenger seatbelt indicators and then after a short drive it will change and show the four-wheel drive indicator.
This Preliminary information communicates assistance in locating the Rear seat belt comfort guides in the parts catalog.
HVAC & Climate
1 bulletinPI to help diagnose A/C concern