Brightdrop Zevo 400 2024–2026 — technical service bulletin
Bulletin PIT6393J · NHTSA communication 11029962 · issued Mar 6, 2026
Technical service bulletin
communication type
Unknown / Other
component
2024–2026
model years
60
vehicle entries
Official summary
This Preliminary Information is to inform customers to follow diagnostics if resetting, disconnecting the module did not correct it.
Vehicles covered
- 2024 Brightdrop Zevo 400
- 2024 Brightdrop Zevo 600
- 2025 Buick Enclave
- 2026 Buick Enclave
- 2024 Buick Envision
- 2025 Buick Envision
- 2026 Buick Envision
- 2025 Cadillac CT5
- 2026 Cadillac CT5
- 2025 Cadillac Escalade
- 2026 Cadillac Escalade
- 2025 Cadillac Escalade Esv
- 2026 Cadillac Escalade Esv
- 2025 Cadillac Escalade IQ
- 2026 Cadillac Escalade IQ
- 2024 Cadillac Lyriq
- 2025 Cadillac Lyriq
- 2026 Cadillac Lyriq
- 2025 Cadillac Optiq
- 2026 Cadillac Optiq
- 2026 Cadillac Vistiq
- 2024 Cadillac XT4
- 2025 Cadillac XT4
- 2026 Cadillac XT4
- 2024 Chevrolet Blazer EV
- 2025 Chevrolet Blazer EV
- 2026 Chevrolet Blazer EV
- 2025 Chevrolet Brightdrop 400
- 2025 Chevrolet Brightdrop 600
- 2024 Chevrolet Colorado
- 2025 Chevrolet Colorado
- 2026 Chevrolet Colorado
- 2026 Chevrolet Corvette Convertible
- 2026 Chevrolet Corvette Convertible E-Ray
- 2026 Chevrolet Corvette Coupe
- 2026 Chevrolet Corvette Coupe E-Ray
- 2024 Chevrolet Equinox
- 2025 Chevrolet Equinox
- 2026 Chevrolet Equinox
- 2024 Chevrolet Equinox EV
- 2025 Chevrolet Equinox EV
- 2026 Chevrolet Equinox EV
- 2024 Chevrolet Silverado EV
- 2025 Chevrolet Silverado EV
- 2026 Chevrolet Silverado EV
- 2025 Chevrolet Suburban 1500
- 2026 Chevrolet Suburban 1500
- 2025 Chevrolet Tahoe
- 2026 Chevrolet Tahoe
- 2024 Chevrolet Traverse
- 2025 Chevrolet Traverse
- 2026 Chevrolet Traverse
- 2024 GMC Acadia
- 2025 GMC Acadia
- 2026 GMC Acadia
- 2024 GMC Canyon
- 2025 GMC Canyon
- 2026 GMC Canyon
- 2026 GMC Hummer EV Pickup
- 2026 GMC Hummer EV SUV
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.