Brightdrop 600 Elcv 2024–2026 — technical service bulletin
Bulletin N25-252332 · NHTSA communication 11035300 · issued Jul 9, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2024–2026
model years
17
vehicle entries
Official summary
• Fixes to help prevent loss of functionality for connectivity features such as OnStar, Wi-Fi, Navigation, and Super Cruise.
Vehicles covered
- 2024 Brightdrop 600 Elcv
- 2024 Brightdrop Zevo 400
- 2024 Brightdrop Zevo 600
- 2024 Buick Envision
- 2025 Buick Envision
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2025 Chevrolet Brightdrop 400
- 2026 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2026 Chevrolet Brightdrop 600
- 2025 Chevrolet Colorado
- 2026 Chevrolet Colorado
- 2025 Chevrolet Silverado EV
- 2025 GMC Canyon
- 2026 GMC Canyon
- 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.