Service bulletins for the 2024 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.
272 on file from NHTSA, as of 2026-10-19.
About C1114 on the 2024 GMC Hummer EV SUV: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: C1114 are shown. Show all
| 23-NA-149 | 2024-02-23. Service bulletin. ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL; SERVICE BRAKES, HYDRAULIC; EQUIPMENT; ELECTRICAL SYSTEM. This technical bulletin provides a procedure to correct the condition of Trailer Brake Disabled and/or DTC C1114 Stored During Pulling a Trailer with a Battery, Generator or Solar Charger. |
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| 23-NA-149 | 2023-10-10. Service bulletin. EQUIPMENT; SERVICE BRAKES. This technical bulletin provides a procedure to correct the condition of Trailer Brake Disabled and/or DTC C1114 Stored During Pulling a Trailer with a Battery, Generator or Solar Charger. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.