The problem: on affected vehicles, the transmission clutch spring retaining ring may not be fully seated due to a manufacturing defect. In vehicles with this condition, a transmission malfunction indicator warning light will appear on the dashboard, alerting the driver of the issue. This warning light will appear when the vehicle is relatively new and with low mileage on the odometer. This problem affects vehicles in dealership inventory only, GM has determined, so no action will be required by owners of these vehicles.
The hazards: GM did not say what problems an unseated transmission clutch spring retaining may lead to, although as noted above, the problem will produce a malfunction indicator warning light on the dashboard. This problem will also produce a diagnostic trouble code (or DTC) of P0747.
The fix: dealers will inspect affected vehicles and replace the transmission clutch spring retaining ring.
Affected component: transmission clutch spring retaining ring.
- 2020 Chevy Blazer
- 2021 Chevy Blazer
- 2020 Chevy Equinox
- 2020 GMC Terrain
- 2021 GMC Terrain
- General Motors service bulletin number: N202321840
- Chevy customer service: 1-800-222-1020
- GMC customer service: 1-800-462-8782