Throttle Body ServiceFuel Pressure Relief

CAUTION: Wear safety glasses when using compressed air in order to prevent eye injury.

Remove the throttle body from the vehicle. Refer to Throttle Body Assembly Replacement .

Fig 1: View Of Throttle Body Assembly And Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Open the throttle valve of the throttle body.
Use a solvent soaked cloth to remove dirt or carbon deposits/buildup from the throttle valve and the throttle bore.
Ensure that the throttle valve and throttle bore are clean and dry.
Inspect that the throttle valve operates smoothly and freely.
Install the throttle body to the vehicle. Refer to Throttle Body Assembly Replacement .