Buick Enclave 2021–2022 — technical service bulletin
Bulletin N25-250552 · NHTSA communication 11028977 · issued Feb 5, 2026
Technical service bulletin
communication type
Unknown OR Other
component
2021–2022
model years
37
vehicle entries
Official summary
Improvements to OnStar functionality. During the update process, your radio may stay on up to 5 minutes after you exit the vehicle. This is expected behavior when an update package is onboard the vehicle. Do not service your vehicle during installation.
Vehicles covered
- 2021 Buick Enclave
- 2022 Buick Enclave
- 2021 Buick Encore
- 2022 Buick Encore
- 2021 Cadillac XT4
- 2022 Cadillac XT4
- 2021 Cadillac XT5
- 2022 Cadillac XT5
- 2021 Cadillac XT6
- 2022 Cadillac XT6
- 2021 Chevrolet Blazer
- 2022 Chevrolet Blazer
- 2022 Chevrolet Bolt Euv
- 2021 Chevrolet Bolt EV
- 2022 Chevrolet Bolt EV
- 2021 Chevrolet Camaro
- 2022 Chevrolet Camaro
- 2021 Chevrolet Equinox
- 2022 Chevrolet Equinox
- 2021 Chevrolet Malibu
- 2022 Chevrolet Malibu
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
- 2021 Chevrolet Silverado 2500
- 2022 Chevrolet Silverado 2500
- 2021 Chevrolet Trailblazer
- 2022 Chevrolet Trailblazer
- 2021 Chevrolet Traverse
- 2022 Chevrolet Traverse
- 2021 GMC Acadia
- 2022 GMC Acadia
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2021 GMC Terrain
- 2022 GMC Terrain
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.