Brightdrop 600 Elcv 2023–2026 — service campaign
Bulletin N252529080 · NHTSA communication 11030439 · issued Apr 1, 2026
Service campaign
communication type
Electrical System
component
2023–2026
model years
20
vehicle entries
Official summary
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.
Vehicles covered
- 2023 Brightdrop 600 Elcv
- 2024 Brightdrop 600 Elcv
- 2024 Brightdrop Zevo 400
- 2025 Cadillac Escalade IQ
- 2026 Cadillac Escalade IQ
- 2026 Cadillac Escalade Iql
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2026 Chevrolet Silverado EV
- 2024 GMC Hummer EV Pickup
- 2025 GMC Hummer EV Pickup
- 2026 GMC Hummer EV Pickup
- 2024 GMC Hummer EV SUV
- 2025 GMC Hummer EV SUV
- 2026 GMC Hummer EV SUV
- 2024 GMC Sierra EV
- 2025 GMC Sierra EV
- 2026 GMC Sierra EV
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.