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
Only bulletins with type: Service campaign are shown. Show all
| N252516700-01 | 2026-08-26. 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. |
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| N252529080 | 2026-04-01. 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. |
| N252541510 | 2026-03-03. Service campaign. UNKNOWN OR OTHER. Certain vehicles may have been sold with a GM NACS Level 2 EV charging adapter (NACS to J1772) in which a quality issue was identified. Dealers are to provide the customer with the latest design charging adapter. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.