Brightdrop 600 Elcv 2022–2025 — technical service bulletin
Bulletin 23-NA-151 · NHTSA communication 11008903 · issued Aug 14, 2024
Technical service bulletin
communication type
Fuel/propulsion System
component
2022–2025
model years
19
vehicle entries
Official summary
This service bulletin and criteria within are to determine the internal state of the High Voltage Battery and core return shipping method.
Vehicles covered
- 2023 Brightdrop 600 Elcv
- 2024 Brightdrop 600 Elcv
- 2022 Brightdrop EV600
- 2024 Brightdrop Zevo 400
- 2023 Brightdrop Zevo 600
- 2024 Brightdrop Zevo 600
- 2023 Cadillac Lyriq
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2024 Chevrolet Equinox EV
- 2025 Chevrolet Equinox EV
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2022 GMC Hummer EV Pickup
- 2023 GMC Hummer EV Pickup
- 2024 GMC Hummer EV Pickup
- 2025 GMC Hummer EV Pickup
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.