Brightdrop 600 Elcv 2017–2025 — technical service bulletin

Bulletin 21-NA-068 · NHTSA communication 11001972 · issued Jun 8, 2024

Technical service bulletin

communication type

Electrical System

component

2017–2025

model years

vehicle entries

Official summary

This warranty administration bulletin provides policy information requirements applicable to key fob replacement under the New Vehicle Limited Warranty or under a Replacement Parts Warranty on 2017-2022 and newer model year vehicles with RPO ATH and AVJ.

Vehicles covered

2023 Brightdrop 600 Elcv
2017 Buick Cascada
2018 Buick Cascada
2019 Buick Cascada
2017 Buick Enclave
2018 Buick Enclave
2019 Buick Enclave
2020 Buick Enclave
2021 Buick Enclave
2022 Buick Enclave
2023 Buick Enclave
2024 Buick Enclave
2025 Buick Enclave
2017 Buick Encore
2018 Buick Encore
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
2017 Buick Envision
2018 Buick Envision
2019 Buick Envision
2020 Buick Envision
2021 Buick Envision
2022 Buick Envision
2023 Buick Envision
2024 Buick Envision
2024 Buick Envista
2025 Buick Envista
2017 Buick Lacrosse
2018 Buick Lacrosse
2019 Buick Lacrosse
2020 Buick Lacrosse
2017 Buick Regal
2018 Buick Regal
2019 Buick Regal
2020 Buick Regal
2018 Buick Regal Tourx
2020 Buick Regal Tourx
2017 Buick Verano
2017 Cadillac Ats
2018 Cadillac Ats
2019 Cadillac Ats
2017 Cadillac Ats-V
2018 Cadillac Ats-V
2020 Cadillac CT4
2021 Cadillac CT4
2022 Cadillac CT4
2023 Cadillac CT4
2024 Cadillac CT4
2025 Cadillac CT4
2020 Cadillac CT5

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.