Brightdrop EV600 2022–2026 — technical service bulletin
Bulletin PIT6393B · NHTSA communication 11020963 · issued Jul 26, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2022–2026
model years
41
vehicle entries
Official summary
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it. It also informs them to follow the bulletins as necessary to USB update the modules.
Vehicles covered
- 2022 Brightdrop EV600
- 2024 Brightdrop Zevo 400
- 2025 Buick Enclave
- 2024 Buick Envision
- 2025 Buick Envision
- 2025 Cadillac CT5
- 2025 Cadillac Escalade
- 2025 Cadillac Escalade Esv
- 2026 Cadillac Escalade Esv Iql
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2025 Cadillac Optiq
- 2026 Cadillac Vistiq
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2026 Chevrolet Brightdrop 400
- 2026 Chevrolet Brightdrop 600
- 2024 Chevrolet Colorado
- 2025 Chevrolet Colorado
- 2024 Chevrolet Equinox
- 2025 Chevrolet Equinox
- 2026 Chevrolet Equinox
- 2024 Chevrolet Equinox EV
- 2025 Chevrolet Equinox EV
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2025 Chevrolet Suburban 1500
- 2025 Chevrolet Tahoe
- 2024 Chevrolet Traverse
- 2025 Chevrolet Traverse
- 2024 GMC Acadia
- 2025 GMC Acadia
- 2025 GMC Canyon
- 2024 GMC Sierra EV
- 2025 GMC Sierra EV
- 2025 GMC Terrain
- 2026 GMC Terrain
- 2025 GMC Yukon
- 2025 GMC Yukon XL
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.