Buick Enclave 2021–2026 — technical service bulletin
Bulletin N25-250552 · NHTSA communication 11026842 · issued Dec 3, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2021–2026
model years
60
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
- 2022 Buick Enclave
- 2023 Buick Enclave
- 2024 Buick Enclave
- 2024 Buick Encore
- 2025 Buick Encore
- 2026 Buick Encore
- 2021 Buick Encore GX
- 2022 Buick Encore GX
- 2023 Buick Encore GX
- 2024 Buick Encore GX
- 2025 Buick Encore GX
- 2026 Buick Encore GX
- 2024 Buick Envista
- 2025 Buick Envista
- 2021 Cadillac XT4
- 2022 Cadillac XT4
- 2023 Cadillac XT4
- 2021 Cadillac XT5
- 2022 Cadillac XT5
- 2023 Cadillac XT5
- 2024 Cadillac XT5
- 2025 Cadillac XT5
- 2021 Cadillac XT6
- 2022 Cadillac XT6
- 2023 Cadillac XT6
- 2024 Cadillac XT6
- 2025 Cadillac XT6
- 2021 Chevrolet Blazer
- 2022 Chevrolet Blazer
- 2023 Chevrolet Blazer
- 2024 Chevrolet Blazer
- 2025 Chevrolet Blazer
- 2022 Chevrolet Bolt EV
- 2023 Chevrolet Bolt EV
- 2021 Chevrolet Camaro
- 2022 Chevrolet Camaro
- 2023 Chevrolet Camaro
- 2024 Chevrolet Camaro
- 2022 Chevrolet Equinox
- 2023 Chevrolet Equinox
- 2024 Chevrolet Equinox
- 2021 Chevrolet Malibu
- 2022 Chevrolet Malibu
- 2023 Chevrolet Malibu
- 2024 Chevrolet Malibu
- 2025 Chevrolet Malibu
- 2021 Chevrolet Silverado 1500
- 2022 Chevrolet Silverado 1500
- 2023 Chevrolet Silverado 1500
- 2021 Chevrolet Trailblazer
- 2022 Chevrolet Trailblazer
- 2023 Chevrolet Trailblazer
- 2024 Chevrolet Trailblazer
- 2025 Chevrolet Trailblazer
- 2022 Chevrolet Traverse
- 2023 Chevrolet Traverse
- 2024 Chevrolet Traverse
- 2024 Chevrolet Trax
- 2025 Chevrolet Trax
- 2021 GMC Acadia
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.