2026 GMC Terrain Technical Service Bulletins

175 technical service bulletins (TSBs) are on record for the 2026 GMC Terrain. TSBs are notes manufacturers send to dealers about repair procedures for issues seen in the field. They are not recalls and do not by themselves mean a vehicle has a fault.

• 11032554Apr 28, 2026Other or unknown. This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
• 11031745Apr 23, 2026Other or unknown. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
• 11031366Apr 16, 2026Other or unknown. Certain vehicles, may have a condition in which the Telematic Control Module may enter an unrecoverable state. Dealers are to reprogram the Telematic Control Module. Important: The module may be several software versions behind and could take multiple programming events to bring it to the latest software level (The same calibration screen MUST be displayed to validate the module has been programmed to the latest…
• 11031788Apr 14, 2026Other or unknown. • This update contains a required software change to help improve the overall software update and diagnostics process. Be sure to install this update to be able to receive future software updates. • Improves traction and stability control when accelerating or on uneven terrain. • Improves braking and stopping performance on low-traction surfaces. • Improves the performance of assisted braking features.
• 11031514Apr 14, 2026Other or unknown. This preliminary information is to inform technicians that GM is placing the B174W Front View Camera Module (ACP2) on 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…
• 11031282Apr 8, 2026Other or unknown. This preliminary information announces the end of an engineering investigation into a brake pad noise.
• 11031277Apr 8, 2026Other or unknown. This Preliminary information communicates the possibility of MIL with DTC set of U060F, U1346, and/or P0102.
• 11030974Apr 1, 2026Other or unknown. This preliminary information communicates information about how to determine if a wheel and tires size change is available.
• 11030361Mar 27, 2026Other or unknown. This Preliminary information communicates an issue with the virtual garage door opener not programming to a garage opener. Engineering is working on a new module.
• 11030358Mar 27, 2026Other or unknown. This Preliminary information communicates the potential for coolant leak areas on LSD engines.
• 11030201Mar 17, 2026Other or unknown. This preliminary information is for technicians that will have this message after USB updating the radio. The repair should not involve replacing a module as pressing the reset button will correct this issue.
• 11030465Mar 9, 2026Other or unknown. Great News! Your vehicle keeps getting better. This update contains a required software change to help improve the overall software update and diagnostics process. 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…
• 11030092Mar 9, 2026Other or unknown. This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
• 11030091Mar 9, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11029962Mar 6, 2026Other or unknown. This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
• 11029955Mar 5, 2026Other or unknown. A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
• 11029949Mar 5, 2026Other or unknown. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
• 11029901Mar 5, 2026Other or unknown. • Improvements to the performance of vehicle software updates. • Fixes to help prevent loss of functionality for connectivity features, including maps and Wi-Fi. • Fixes to help prevent erroneous emergency calls from vehicle. • Fixes for deleting digital keys. • Fixes to help ensure proper functionality for mobile app features.
• 11029299Mar 3, 2026Other or unknown. This Preliminary information communicates the possibility of reduced power with dtc P0237 and/or p0299 due to damaged Charge Air Inlet Pipe connection at Turbocharger.
• 11029950Mar 2, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC'ss
• 11029323Feb 26, 2026Other or unknown. A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
• 11028943Feb 20, 2026Other or unknown. A vehicle may come in with a dead battery. Tech is instructed to inspect the window switches for coins.
• 11028942Feb 20, 2026Other or unknown. This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
• 11028937Feb 17, 2026Other or unknown. A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar learn procedure to complete. Tech is directed to drive a city route to complete the procedure.
• 11028702Feb 7, 2026Other or unknown. This Preliminary information communicates an issue with 8T45 no shift out of first gear, engineering is investigating.
• 11028699Feb 5, 2026Other or unknown. This preliminary information is to communicate to technicians that a sequence in programming has changed for these vehicles with this RPO. Failure to follow this sequence will result in a reversed, reverse camera image and cannot be corrected once programmed.
• 11028697Feb 3, 2026Other or unknown. This preliminary information communicates an issue with the key fob buttons inoperative and how to resync the fobs back to the vehicle.
• 11027938Jan 28, 2026Other or unknown. This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
• 11027880Jan 22, 2026Other or unknown. This preliminary information communicates an issue with the DRL LED strips flickering and dealer are to replace the lighting control module.
• 11027888Jan 20, 2026Other or unknown. This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a TCM data pull.
• 11027697Jan 16, 2026Other or unknown. This Preliminary information communicates to the field on how to diagnosis a GPS issue with the Telematic module with no DTC's
• 11027702Jan 15, 2026Other or unknown. This Preliminary Information is to inform technicians to not replace any parts at this time and to use the work around provided. When a fix is available, this PI will be updated to a bulletin.
• 11027691Jan 15, 2026Other or unknown. This Preliminary Information is to inform technicians to not replace any parts at this time and to use the work around provided. When a fix is available, this PI will be updated to a bulletin.
• 11027690Jan 15, 2026Other or unknown. This preliminary information communicates an issue with the DRL LED strips flickering and dealer are to replace the lighting control module.
• 11027701Jan 14, 2026Other or unknown. This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered vehicles and advises of warranty direction.
• 11027688Jan 12, 2026Other or unknown. This Preliminary Information communicates a change to the PCV ports on camshaft covers.
• 11027686Jan 12, 2026Other or unknown. This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
• 11027607Jan 8, 2026Other or unknown. This preliminary information communicates an issue with the DRL LED strips flickering and dealer are to replace the lighting control module.
• 11027601Jan 8, 2026Other or unknown. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
• 11026923Dec 31, 2025Other or unknown. This Preliminary information communicates to dealers a procedure to reset the radio.
• 11026861Dec 23, 2025Other or unknown. "This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it. It also informs them to follow the bulletins as necessary to USB update the modules."
• 11026727Dec 19, 2025Other or unknown. This PI communicates information that the Collision / Detection Systems will revert to default setting of Alert and Brake after an Ignition Cycle due to an Engineering change.
• 11026725Dec 19, 2025Other or unknown. This preliminary information bulletin discusses an engineering investigation into an intermittent false alert from the side object detection system.
• 11026714Dec 15, 2025Other or unknown. This preliminary information communicates an issue with the DRL LED strips flickering and dealer are to replace the lighting control module.
• 11026602Dec 12, 2025Other or unknown. This preliminary information document addresses an engineering investigation into a launch vibration concern.
• 11026601Dec 12, 2025Other or unknown. This PI addresses leaks from the case half and provides repair direction to dealer technicians
• 11026600Dec 12, 2025Other or unknown. This preliminary information is for technicians that may see DTCs that are history and should not perform any part replacements. They should follow the notes mentioned prior to anything being replaced.
• 11026599Dec 12, 2025Other or unknown. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
• 11026496Dec 5, 2025Other or unknown. This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it. It also informs them to follow the bulletins as necessary to USB update the modules.
• 11026491Dec 4, 2025Other or unknown. A vehicle may come in with a dead battery. Tech is instructed to inspect the window switch for coins.

← All problems reported for the 2026 GMC Terrain