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Service bulletins for the 2025 GMC Hummer EV SUV

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.

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

By type

By component

By trouble code

Bulletins, newest first
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
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.
PIT6209K2026-06-02. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates recovery procedure after return to dealer message.
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.
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.
PIC6602X2026-05-28. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
PIC6540J2026-05-19. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers a procedure to reset the radio.
PIT65122026-05-19. 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.
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
PIT6193B2026-05-13. Service bulletin. UNKNOWN OR OTHER. PI created to provide dealer technicians with procedures for updating Google Maps.
PIC6630B2026-05-13. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to recover an IOK radio.
PIC6602V2026-05-13. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
PIC6602W2026-05-13. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
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.
PIC6602U2026-04-30. Service bulletin. UNKNOWN OR OTHER. This Preliminary information communicates to dealers steps to follow to obtain an IOK radio.
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
PIT65032026-04-23. 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.
PIT3271Q2026-04-07. Service bulletin. UNKNOWN OR OTHER. This preliminary information communicates information about how to determine if a wheel and tires size change is available.
654.102026-04-01. Over-the-air update. UNKNOWN OR OTHER. • Improvements to help protect battery health in low temperatures. • Improvements to diagnostics to reduce service messages. • Fixes to help protect battery health in high temperatures. • Fixes to improve responsiveness for vehicle diagnostics.
N2525290802026-04-01. Service campaign. ELECTRICAL SYSTEM. Service Update. Certain vehicles listed above may be missing a high voltage header plug on the RESS battery pack drive motor connector. Dealers are to inspect the RESS pack connectors and install the proper HV Header Plug if missing.
654.202026-04-01. Over-the-air update. UNKNOWN OR OTHER. • Improvements to the performance of One-Pedal Driving. • Improvements to leveling corrections. • Improvements to the performance of Super Cruise. • Improvements to the opening power of the rear power gate. • Fixes to address antilock braking system responsiveness.

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