Brightdrop Zevo 400 2022–2025 — technical service bulletin
Bulletin 25-NA-044 · NHTSA communication 11015223 · issued Feb 25, 2025
Technical service bulletin
communication type
Electrical System
component
2022–2025
model years
22
vehicle entries
Official summary
This service bulletin provides information for dealers/technicians on SPS2 Hybrid/EV Battery Data Retrieval for Service High Voltage DTCs.
Vehicles covered
- 2024 Brightdrop Zevo 400
- 2023 Brightdrop Zevo 600
- 2024 Brightdrop Zevo 600
- 2025 Cadillac Escalade IQ
- 2023 Cadillac Lyriq
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2025 Cadillac Optiq
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 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
- 2024 GMC Sierra EV
- 2025 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.