2026 GMC Sierra EV technical service bulletins
161 technical service bulletins and manufacturer communications cover the 2026 GMC Sierra EV.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
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- If a vehicle has an when attempting to perform a vehicle dynamic sensor learn, the scan tool may display a...
- • This update contains a required software change to help improve the overall software update and...
- Customer Satisfaction Program
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- Squeaking or creaking noise from the rear upper front control arm bushing, over bumps or when turning.
- This update contains a required software change to help improve the overall software update and...
- • Fixes to help ensure start reliability and prevent battery drain • Improved charging performance and...
- • Improved guidance for Lane Centering Assistance in the driver display • System changes to support future...
- • Better responsiveness for the driver display and rear-view camera • Infotainment system improvements for...
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- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
- If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path...
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- The Battery Energy Control Module (BECM) in certain vehicles include battery-monitoring software
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- This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and...
- This PI advise dealers If U3000 is present, follow the correct service doc by Symptom Byte before...
- • Additional protection for battery health and to help prevent battery drain • Improved charging messaging...
- This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set...
- PI to help diagnose A/C concern
- • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your...
- This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes...
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- • Improvements to active cabin ventilation • Additional protection for the health of your battery •...
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- • Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation,...
- This PI provides diagnostic steps for dealer technicians to verify the condition and ensure that part...
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- Condition in which the Telematic Control Module may enter an unrecoverable state
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- Pi created to provide GM dealers with information on gathering information for projection issue
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- • Fixes to help ensure successful vehicle software updates • Improvements to the availability of driver...
- Condition in which the Telematic Control Module may enter an unrecoverable state
- Service Update
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- • Improvements to accuracy of Park Assist messaging
- • Improvements to diagnostics and service messaging for battery health, particularly in humid conditions •...
- • Improvements to the performance of driver assistance features • Fixes to help ensure accurate driver...
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- Condition in which hard braking may unexpectedly engage
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- This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a...
- A vehicle may have a service driver assist message and the technician cannot get the Long Range Radar...
- Been sold with a GM NACS Level 2 EV charging adapter (NACS to J1772) in which a quality issue was identified
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- This PI communicates information informing dealers that Engineering is aware of the clunk noise and is...
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- Condition in which hard braking may unexpectedly engage
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- This P/I is advising that the TCM should not be replaced for DTC P16F4 and to follow the repair instructions.
- This PI provides diagnostics tips to dealership techs when trying to diagnose a CAN Bus communication...
- This P/I is advising that the TCM should not be replaced for DTC P16F4 and to request FSE assistance for a...
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- This PI advised dealer technicians of possible causes of diesel fuel contamination in gasoline powered...
- This PI communicates an issue where the Brake System Control Module DTC: U0028-88 and U0037-88 diagnostics...
- This PI communicates information that the Collision / Detection Systems will revert to default setting of...
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- The Driver Information Center may display a message of Transport Mode On after the ignition is cycled.
- This bulletin advises the tech not to replace the shock for possible air leak, but to replace the air...
- This information provides software update information for the K73 Telematics module to correct the...
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- A vehicle may come in with B3A6B set in history
- New Vehicle Monitoring Programs Section in IVH
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- This preliminarily information communication an issue with the supercruise dropping out when next to a...
- This Warranty Administration service bulletin provides Lithium-Ion battery Exchange Process and...
- This informational bulletin provides information on Automated Brake Bleed and/or Brake Hydraulic Test...
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- Diagnostic Guidance for U3000-97 Long Range Radar Blocked
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- This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.
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- This service bulletin provides information on Tire Sidewall Irregularities.
- This service bulletin provides information for the technicians to use a Customer Concern Verification...
- This warranty administration bulletin provides information for dealers/technicians on System Reset and...
- This warranty administration bulletin provides policy information for GM courtesy transportation and...
- This service bulletin provides information on the proper Reflective High Temperature Heat and/or...
- The intent of this service bulletin is to identify aftermarket ALDL or DLC interface devices as potential...
- This informational bulletin instructs the tech when fuel/fluid is needed to be tested and where it can be...
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