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Service bulletins for the 2026 GMC Hummer EV Pickup

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

129 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
PIT6146A2026-07-13. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates on a software anomaly for a DTC that sets for the incorrect side and how to address that concern.
662.202026-07-08. Over-the-air update. UNKNOWN OR OTHER. • Additional protection for battery health and to help prevent battery drain • Improved charging messaging in the driver display • Improved vehicle diagnostics • Improved vehicle performance when driving in Reverse on slippery surfaces • Better One-Pedal Driving performance • Additional protection for battery health and prevention for battery drain • Improved accuracy for driver display message
662.112026-07-08. Over-the-air update. UNKNOWN OR OTHER. • Updates to ensure correct speed limit in the driver display • Improvements to driver display messages • Additional protection to help prevent battery drain
PIT5966F2026-07-07. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates an issue with an OTA pending message still displayed after an OTA event and how to reset/clear the message.
PIT65232026-06-18. Service bulletin. UNKNOWN OR OTHER. This PI provides diagnostic steps for dealer technicians to verify the condition and ensure that part replacement is necessary
PIT6477C2026-06-08. Service bulletin. UNKNOWN OR OTHER. This preliminary PI was created to advise techniians in the field that they will not be able to perform a GDS automated bleed with the scan tool dues to a issue with the software in the scan tool
PIT6426B2026-06-08. Service bulletin. UNKNOWN OR OTHER. Fog lamp control may be missing from radio display after a BCM update. Engineering is investigating.
PIT6503A2026-06-08. Service bulletin. UNKNOWN OR OTHER. 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 specific step that directs camera replacement.
PIT65192026-06-02. Service bulletin. UNKNOWN OR OTHER. This preliminary information is to inform technicians and customers that the voice command will be inoperative when trying to open applications. Engineering is investigating and this PI will be converted to a bulletin when a repair is available.
PIP61172026-06-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information communicates possible conditions arising from corrosion on the JX310 splice pack that could affect vehicle operation including the ability to start, drive, charge their EV.
PIT6426A2026-05-28. Service bulletin. UNKNOWN OR OTHER. If a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
PIT6215C2026-05-28. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealership technicians that if they encounter a customer vehicle with this concern, to perform the steps listed and should be able to reprogram the module and correct this.
PIC6540J2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6393L2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
PIC6540H2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6423A2026-05-19. Service bulletin. UNKNOWN OR OTHER. Pi created to provide GM dealers with information on gathering information for projection issue
PIC6551B2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
PIC6629E2026-05-13. Service bulletin. UNKNOWN OR OTHER. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
PIC6540G2026-05-08. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIC6540G2026-05-08. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIT6393K2026-05-08. Service bulletin. UNKNOWN OR OTHER. This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
661.502026-04-30. Over-the-air update. UNKNOWN OR OTHER. • Surround Vision Recorder, a new feature that allows you to record, watch, and save video from your vehicle's cameras. • Security Recording, a new feature that can automatically begin recording if your vehicle's alarm is triggered while it is parked. • Fixes to help ensure responsiveness for the driver display and rear view camera. • Fixes to help ensure proper Super Cruise lane change functionality. • Improvements to the performance of Bose AudioPilot to better counteract road and ambient noise. • Your towing experience is improving by preventing enabling King Crab mode when a trailer is attached. • When towing a trailer, you will now experience less trailer sway. • This update will help prevent One-Pedal Driving from deactivating after you remote start your vehicle. • Fixes to help ensure successful vehicle software updates. • Improvements to performance for under-hood storage opening. • Fixes to help ensure the swing gate opens and closes properly. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features.
661.402026-04-30. Over-the-air update. UNKNOWN OR OTHER. • Improvements to the performance of Brake Assist. • Fixes to help ensure proper Super Cruise lane change functionality.
661.302026-04-30. Over-the-air update. UNKNOWN OR OTHER. • Improvements to the performance of Bose AudioPilot to better counteract road and ambient noise. • Your towing experience is improving by preventing enablement of King Crab mode when a trailer is attached. • When towing a trailer, you will now experience less trailer sway. • This update will help prevent One-Pedal Driving from deactivating after you remote start your vehicle. • Fixes to help ensure proper functionality for Brake Assist. • Fixes to help ensure successful vehicle software updates. • Improvements to performance for under-hood storage opening • Fixes to help ensure the swing gate opens and closes properly. • Fixes to help ensure proper functionality of Forward Collision Alert and availability of driver assistance features.
PIC6629D2026-04-30. Service bulletin. UNKNOWN OR OTHER. This PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.