Brightdrop 600 Elcv 2019–2025 — technical service bulletin
Bulletin 21-NA-135 · NHTSA communication 11014222 · issued Jan 28, 2025
Technical service bulletin
communication type
Electrical System
component
2019–2025
model years
60
vehicle entries
Official summary
This service bulletin provides information to inform dealership personnel about Law Enforcement and Government vehicles that request to disable or enable content.
Vehicles covered
- 2024 Brightdrop 600 Elcv
- 2024 Brightdrop Zevo 600
- 2019 Buick Cascada
- 2019 Buick Enclave
- 2020 Buick Enclave
- 2021 Buick Enclave
- 2022 Buick Enclave
- 2023 Buick Enclave
- 2024 Buick Enclave
- 2025 Buick Enclave
- 2019 Buick Encore
- 2020 Buick Encore
- 2021 Buick Encore
- 2022 Buick Encore
- 2023 Buick Encore
- 2024 Buick Encore
- 2025 Buick Encore
- 2020 Buick Encore GX
- 2021 Buick Encore GX
- 2022 Buick Encore GX
- 2023 Buick Encore GX
- 2024 Buick Encore GX
- 2025 Buick Encore GX
- 2019 Buick Envision
- 2020 Buick Envision
- 2021 Buick Envision
- 2022 Buick Envision
- 2023 Buick Envision
- 2024 Buick Envision
- 2025 Buick Envision
- 2024 Buick Envista
- 2025 Buick Envista
- 2019 Buick Lacrosse
- 2020 Buick Lacrosse
- 2019 Buick Regal
- 2020 Buick Regal
- 2020 Buick Regal Tourx
- 2019 Cadillac Ats
- 2019 Cadillac Ats-V
- 2020 Cadillac CT4
- 2021 Cadillac CT4
- 2022 Cadillac CT4
- 2023 Cadillac CT4
- 2024 Cadillac CT4
- 2025 Cadillac CT4
- 2020 Cadillac CT5
- 2021 Cadillac CT5
- 2022 Cadillac CT5
- 2023 Cadillac CT5
- 2024 Cadillac CT5
- 2025 Cadillac CT5
- 2019 Cadillac CT6
- 2020 Cadillac CT6
- 2021 Cadillac CT6
- 2019 Cadillac CTS
- 2019 Cadillac Escalade
- 2020 Cadillac Escalade
- 2021 Cadillac Escalade
- 2022 Cadillac Escalade
- 2023 Cadillac Escalade
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.