Brightdrop Zevo 400 2021–2025 — technical service bulletin
Bulletin PIT6265 · NHTSA communication 11011465 · issued Oct 24, 2024
Technical service bulletin
communication type
Unknown / Other
component
2021–2025
model years
51
vehicle entries
Official summary
This Preliminary information communicates to dealership technicians that if they encounter a vehicle with this issue, they can contact TCSC to have the software for the MDI backdated to communicate properly.
Vehicles covered
- 2024 Brightdrop Zevo 400
- 2024 Brightdrop Zevo 600
- 2025 Buick Enclave
- 2023 Buick Envision
- 2024 Buick Envision
- 2025 Buick Envision
- 2025 Cadillac CT4
- 2024 Cadillac CT5
- 2025 Cadillac CT5
- 2021 Cadillac Escalade
- 2022 Cadillac Escalade
- 2023 Cadillac Escalade
- 2024 Cadillac Escalade
- 2021 Cadillac Escalade Esv
- 2022 Cadillac Escalade Esv
- 2023 Cadillac Escalade Esv
- 2024 Cadillac Escalade Esv
- 2023 Cadillac Lyriq
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2025 Cadillac XT5
- 2024 Chevrolet Blazer
- 2025 Chevrolet Blazer
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2024 Chevrolet Corvette
- 2025 Chevrolet Equinox
- 2022 Chevrolet Silverado 1500
- 2023 Chevrolet Silverado 1500
- 2024 Chevrolet Silverado 1500
- 2025 Chevrolet Silverado 1500
- 2021 Chevrolet Tahoe
- 2022 Chevrolet Tahoe
- 2023 Chevrolet Tahoe
- 2024 Chevrolet Tahoe
- 2025 Chevrolet Tahoe
- 2024 Chevrolet Traverse
- 2025 Chevrolet Traverse
- 2025 GMC Hummer EV Pickup
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
- 2025 GMC Terrain
- 2021 GMC Yukon
- 2022 GMC Yukon
- 2023 GMC Yukon
- 2024 GMC Yukon
- 2025 GMC Yukon
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.