Brightdrop Zevo 400 2023–2026 — technical service bulletin
Bulletin PIC6566B · NHTSA communication 11027614 · issued Jan 10, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2023–2026
model years
49
vehicle entries
Official summary
This Preliminary information communicates to dealership technicians to perform the reset for the 2 modules noted above.
Vehicles covered
- 2024 Brightdrop Zevo 400
- 2024 Brightdrop Zevo 600
- 2023 Buick Encore GX
- 2024 Buick Encore GX
- 2025 Buick Encore GX
- 2026 Buick Encore GX
- 2023 Cadillac CT4
- 2024 Cadillac CT4
- 2025 Cadillac CT4
- 2026 Cadillac CT4
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2026 Cadillac Lyriq
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2026 Chevrolet Blazer EV
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2023 Chevrolet Colorado
- 2024 Chevrolet Colorado
- 2025 Chevrolet Colorado
- 2026 Chevrolet Colorado
- 2024 Chevrolet Silverado 1500
- 2025 Chevrolet Silverado 1500
- 2024 Chevrolet Silverado 2500
- 2025 Chevrolet Silverado 2500
- 2026 Chevrolet Silverado 2500
- 2024 Chevrolet Silverado 3500
- 2025 Chevrolet Silverado 3500
- 2026 Chevrolet Silverado 3500
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2023 GMC Canyon
- 2024 GMC Canyon
- 2025 GMC Canyon
- 2026 GMC Canyon
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
- 2026 GMC Sierra 1500
- 2024 GMC Sierra 2500
- 2025 GMC Sierra 2500
- 2026 GMC Sierra 2500
- 2024 GMC Sierra 3500
- 2025 GMC Sierra 3500
- 2026 GMC Sierra 3500
- 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.