Brightdrop Zevo 400 2023–2026 — technical service bulletin
Bulletin PIC6566C · NHTSA communication 11032619 · issued May 6, 2026
Technical service bulletin
communication type
Unknown / Other
component
2023–2026
model years
39
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
- 2026 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
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.