Buick Encore GX 2021–2024 — technical service bulletin
Bulletin 21-NA-169 · NHTSA communication 10241856 · issued Aug 2, 2023
Technical service bulletin
communication type
Power Train
component
2021–2024
model years
36
vehicle entries
Official summary
This service bulletin provides diagnostic information/procedures to aid the service technician in diagnosing 9T45/50/60 automatic transmissions with low mileage and DTCs current or history related to the control solenoids and valves.
Vehicles covered
- 2024 Buick Encore GX
- 2021 Buick Envision
- 2022 Buick Envision
- 2023 Buick Envision
- 2024 Buick Envision
- 2021 Cadillac XT4
- 2022 Cadillac XT4
- 2023 Cadillac XT4
- 2024 Cadillac XT4
- 2021 Cadillac XT5
- 2022 Cadillac XT5
- 2023 Cadillac XT5
- 2024 Cadillac XT5
- 2021 Cadillac XT6
- 2022 Cadillac XT6
- 2023 Cadillac XT6
- 2024 Cadillac XT6
- 2021 Chevrolet Blazer
- 2022 Chevrolet Blazer
- 2023 Chevrolet Blazer
- 2024 Chevrolet Blazer
- 2021 Chevrolet Malibu
- 2022 Chevrolet Malibu
- 2023 Chevrolet Malibu
- 2021 Chevrolet Trailblazer
- 2022 Chevrolet Trailblazer
- 2023 Chevrolet Trailblazer
- 2024 Chevrolet Trailblazer
- 2021 GMC Acadia
- 2022 GMC Acadia
- 2023 GMC Acadia
- 2021 GMC Terrain
- 2022 GMC Terrain
- 2023 GMC Terrain
- 2024 GMC Terrain
- 2022 GMC Terrain NA
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.