GMC Hummer EV SUV Service Bulletins (2026)
126 manufacturer communications on file.
- October 26, 2026•Document ID: 11038684Service CampaignELECTRICAL SYSTEM
- Mfr Comm. #:
- N262565450
- Date Added:
- October 26, 2026
- Manufacturer:
- GMC
SummaryCustomer Satisfaction Program. Certain vehicles listed above may have a condition in which remanufactured high voltage battery packs were built using modules that were ineligible for reuse and require a second replacement. Dealers will replace the high voltage battery.
Associated Products (19)2026 Cadillac Escalade IQ2026 GMC Hummer EV SUV2026 GMC Sierra2025 Cadillac Escalade IQ2025 Chevrolet Blazer2025 Chevrolet BrightDrop2025 Chevrolet Equinox2025 Chevrolet Silverado2025 GMC Hummer EV Pickup2025 GMC Hummer EV SUV2025 GMC Sierra2024 Cadillac Lyriq2024 Chevrolet Blazer2024 Chevrolet Silverado2024 GMC Hummer EV Pickup2024 GMC Hummer EV SUV2024 GMC Sierra2023 GMC Hummer EV Pickup2022 GMC Hummer EV PickupAssociated Documents - October 7, 2026•Document ID: 11038459Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6557
- Date Added:
- October 14, 2026
- Manufacturer:
- GMC
SummaryThis Preliminary information communicates how to resolve a issue where a vehicle is not receiving OTA updates
Associated Products (8)Associated Documents - October 5, 2026•Document ID: 11038139Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6477D
- Date Added:
- October 6, 2026
- Manufacturer:
- CADILLAC
SummaryThis 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
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- Mfr Comm. #:
- PIT6457C
- Date Added:
- October 5, 2026
- Manufacturer:
- CHEVROLET
SummaryThis 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.
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- Mfr Comm. #:
- PIC6540K
- Date Added:
- October 5, 2026
- Manufacturer:
- CHEVROLET
SummaryThis Preliminary information communicates to dealers a procedure to reset the radio.
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- Mfr Comm. #:
- PIT5698F
- Date Added:
- September 30, 2026
- Manufacturer:
- CADILLAC
SummaryThis PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
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- Mfr Comm. #:
- PIT6426C
- Date Added:
- September 22, 2026
- Manufacturer:
- GMC
SummaryIf a vehicle has an issue with super cruise inoperative tech is directed to follow a diagnostic path before replacing the Image processing module.
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- Mfr Comm. #:
- PIC6629F
- Date Added:
- September 16, 2026
- Manufacturer:
- BUICK
SummaryThis PI is to instruct dealer on diagnostic procedures that need to be completed prior to replacing a radio or IPC display
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- Mfr Comm. #:
- PIP4902W
- Date Added:
- September 10, 2026
- Manufacturer:
- CHEVROLET
SummaryThis preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance.
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- Mfr Comm. #:
- 663.30
- Date Added:
- October 2, 2026
- Manufacturer:
- GMC
Summary• 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
Associated Products (2)Associated Documents - September 2, 2026•Document ID: 11037748Over The AirUNKNOWN OR OTHER
- Mfr Comm. #:
- 663.10
- Date Added:
- October 2, 2026
- Manufacturer:
- GMC
SummaryThis 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.
Associated Products (6)Associated Documents - September 2, 2026•Document ID: 11037256Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIT6544
- Date Added:
- September 10, 2026
- Manufacturer:
- CADILLAC
SummaryThis 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.
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- Mfr Comm. #:
- PIT6533B
- Date Added:
- September 2, 2026
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
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- Mfr Comm. #:
- PIT6541
- Date Added:
- September 2, 2026
- Manufacturer:
- GMC
SummaryThis Preliminary information communicates to the technicians a diagnostic tip if a technician loses communication with the image processor #2 and how to restore communication
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- Mfr Comm. #:
- N252516700-01
- Date Added:
- August 26, 2026
- Manufacturer:
- GMC
SummaryThe 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.
Associated Products (11)Associated Documents - August 20, 2026•Document ID: 11036392Service Bulletin/Repair InstructionsUNKNOWN OR OTHER
- Mfr Comm. #:
- PIC6551C
- Date Added:
- August 27, 2026
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communicates to dealer to perform a MEC reset for wireless projection issues
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- Mfr Comm. #:
- PIT6533A
- Date Added:
- August 17, 2026
- Manufacturer:
- CADILLAC
SummaryThis Preliminary information communications information on a Short Range Radar software anomaly causing false / ghost left or right side object detection alerts.
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- Mfr Comm. #:
- PIT6512A
- Date Added:
- August 14, 2026
- Manufacturer:
- BUICK
SummaryThis 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.
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- Mfr Comm. #:
- PIT6517C
- Date Added:
- August 5, 2026
- Manufacturer:
- CADILLAC
SummaryThis 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.
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- Mfr Comm. #:
- PIT6446A
- Date Added:
- July 30, 2026
- Manufacturer:
- CADILLAC
SummaryThis PI Communicates information to ensure Memory Recall is enabled to ensure memory mirrors return to set position after curbview assist is used.
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