Brightdrop EV600 2022–2025 — technical service bulletin
Bulletin PIT6044K · NHTSA communication 11007715 · issued Sep 11, 2024
Technical service bulletin
communication type
Unknown OR Other
component
2022–2025
model years
13
vehicle entries
Official summary
This Preliminary information communicates that a Software update is in the works and to disconnect the 12 volt battery to clear the codes.
Vehicles covered
- 2022 Brightdrop EV600
- 2023 Brightdrop Zevo 600
- 2024 Brightdrop Zevo 600
- 2023 Cadillac Lyriq
- 2024 Cadillac Lyriq
- 2024 Chevrolet Blazer EV
- 2024 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.