Throttle Body Cleaning
- Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (LT1) , or Air Cleaner Outlet Duct Replacement (LT4) .
- Disconnect the electrical connector.
- Fully open the throttle valve in order to Inspect the throttle body bore and the throttle valve plate for any deposits.
- Throttle position (TP) sensor
- Throttle actuator control components
- Sealed throttle shaft bearings
- Use a clean shop towel and an approved GM engine cleaner. Clean the throttle body bore and the throttle valve plate.
If necessary, use a parts cleaning brush in order to remove heavy deposits.
- Connect the electrical connector.
- Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement (LT1) , or Air Cleaner Outlet Duct Replacement (LT4) .
- Perform the following procedure/test: Diagnostic Repair Verification
- Perform the throttle idle learn procedure. Refer to Throttle Body Idle Air Flow Compensation Reset .
Refer to Safety Glasses Warning .
Do not subject a throttle body assembly which contains the following components to an immersion cleaner or a strong solvent:
The cleaners will damage the electric components or sensors.
The cleaners will damage some of these components that contain seals or O-rings.
Solvents can wash away or break down the grease used on non-serviceable throttle shaft bearings.
Never use a wire brush or scraper to clean the throttle body. A wire brush or sharp tools may damage the throttle body components.
Do not use a cleaner that contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.