Brightdrop Zevo 400 2023–2025 — technical service bulletin
Bulletin PIT6317B · NHTSA communication 11017310 · issued Apr 18, 2025
Technical service bulletin
communication type
Unknown OR Other
component
2023–2025
model years
26
vehicle entries
Official summary
This Preliminary information communicates if a customer and service tech encounter a gear display after a radio update, to replace the A11 radio for this concern.
Vehicles covered
- 2024 Brightdrop Zevo 400
- 2025 Buick Enclave
- 2025 Cadillac CT5
- 2025 Cadillac Escalade IQ
- 2023 Cadillac Lyriq
- 2024 Cadillac Lyriq
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2023 Chevrolet Colorado
- 2024 Chevrolet Colorado
- 2025 Chevrolet Colorado
- 2025 Chevrolet Equinox
- 2024 Chevrolet Equinox EV
- 2025 Chevrolet Equinox EV
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2024 Chevrolet Traverse
- 2024 GMC Acadia
- 2023 GMC Canyon
- 2024 GMC Canyon
- 2025 GMC Sierra 1500
- 2025 GMC Sierra EV
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.