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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
PIT65572026-10-14. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates how to resolve a issue where a vehicle is not receiving OTA updates
PIT6477D2026-10-06. 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
PIT6457C2026-10-05. Service bulletin. UNKNOWN OR OTHER. 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.
PIC6540K2026-10-05. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
663.102026-10-02. Over-the-air update. UNKNOWN OR OTHER. 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.
663.302026-10-02. Over-the-air update. UNKNOWN OR OTHER. • After this update, you may need to turn your Turn Signal Activated View setting back on • Fixes to help ensure start reliability and prevent battery drain • Updates to enable memory seat buttons to be linked to a user profile. Up to two user profiles can be linked to your vehicle's memory seat buttons. • Improved charging performance and messages • Better performance and reliability of wireless phone charging
663.202026-10-02. Over-the-air update. UNKNOWN OR OTHER. • After this update, you may need to turn your Turn Signal Activated View setting back on • Fixes to help ensure start reliability and prevent battery drain • Updates to enable memory seat buttons to be linked to a user profile. Up to two user profiles can be linked to your vehicle's memory seat buttons. • Improved charging performance and messages • Better performance and reliability of wireless phone charging
663.402026-10-02. Over-the-air update. UNKNOWN OR OTHER. • Improvements to vehicle software updates
PIT5698F2026-09-30. Service bulletin. UNKNOWN OR OTHER. This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
PIT6426C2026-09-22. 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.
PIC6629F2026-09-16. 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
PIT65442026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information is to inform technicians and customers that GM is aware of the issue and the vehicle can still be driven. When a repair is available, this PI will be updated.
PIP4902W2026-09-10. Service bulletin. UNKNOWN OR OTHER. This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
PIT6533B2026-09-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
PIT65412026-09-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication
662.302026-08-31. Over-the-air update. UNKNOWN OR OTHER. • Improvements to system responsiveness • Improvements to camera image clarity • Fixes to prevent blank screens and audio drop-outs • Improvements to vehicle software update installation • 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 • Updates to allow drive mode selection from the center display
PIC6551C2026-08-27. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
N252516700-012026-08-26. Service campaign. UNKNOWN OR OTHER. The Battery Energy Control Module (BECM) in certain vehicles include battery-monitoring software. An update is available for this software that improves the BECM’s ability to detect moisture inside the RESS enclosure. Dealers are to reprogram the BECM with the updated software.
PIT6533A2026-08-17. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
PIT6512A2026-08-14. Service bulletin. UNKNOWN OR OTHER. This PI states that if SDGM DTC P0604/P0607 is set and no other SDGM DTCs are present, clear DTCs and reset the SDGM. Advises of how to contact PQC to authorize SDGM replacement.
PIT6517C2026-08-05. Service bulletin. UNKNOWN OR OTHER. This PI advise dealers If U3000 is present, follow the correct service doc by Symptom Byte before contacting PQC; if not present, verify the camera is clean, then contact PQC if no issue is found.
PIT6446A2026-07-30. Service bulletin. UNKNOWN OR OTHER. This PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
PIT5099J2026-07-29. Service bulletin. UNKNOWN OR OTHER. PI to help diagnose A/C concern
N2625591202026-07-23. Service bulletin. UNKNOWN OR OTHER. Certain vehicles listed above may have a condition in which the Vehicle Leveling Module (VLM) may enter a faulted state during normal vehicle operation due to a software calibration issue. Dealers will reprogram the Vehicle Leveling Module (VLM). Owners who have accepted applicable terms and conditions will have the opportunity to accept these software changes using wireless over-the-air (OTA) technology without having to bring their vehicle to a dealership. Alternatively, owners may have their vehicle serviced at a GM dealer to receive these software updates.
PIP6081C2026-07-21. Service bulletin. UNKNOWN OR OTHER. This Pi is to let dealer know that a program issue has been released and to not replace any hard for codes P2C8A, P2C8B, U3577, U3578, U3579, U357A, U357B, U357C, U357D, U357E, U357F, U3580, U3581, U3582, U3583, U3584, U2BAA, U2BAB, U2BAC, U2BAD, U2BAE,

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