For 1990-2009 cars only
- Remove the intake air resonator. Refer to Intake Air Resonator Replacement .
- Inspect the throttle body bore and the throttle body plate for deposits. You will need to open the throttle plate in order to inspect all surfaces.
- Clean the throttle body bore and the throttle plate using a clean shop towel with GM top engine cleaner, P/N 1052626 or AC Delco Carburetor Tune-up Conditioner, P/N X66P, or equivalent product.
- Install the intake air resonator. Refer to Intake Air Resonator Replacement .
