Throttle Body Cleaning

Removal Procedure

CAUTION: Take care not to damage the MAF sensor housing screen. Damage to the screen could restrict airflow possibly resulting in a driveability concern.

Air Inlet Duct:

1. Remove the air intake duct.

MAF Sensor:

2. Remove the MAF sensor assembly.

Throttle Body:

3. Inspect the throttle body bore and throttle valve plate for deposits. It is necessary to open the throttle valve to inspect all surfaces.

CAUTION: Do not use any solvent that contains Methyl Ethyl Ketone (MEK). This solvent may damage fuel system components.

4. Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.

Installation Procedure

Notice: The outlet of the air cleaner assembly and the MAF sensor inlet duct must line up when completely installed. Misalignment may cause incorrect airflow readings resulting in MIL illumination or a driveability concern. Improper installation of the inlet duct assembly or air cleaner assembly may cause misalignment.

1. Install the MAF sensor assembly with three bolts. Tighten the MAF sensor assembly attaching bolts to 8 Nm (71 lb in).
3. Install the intake air duct.
4. Perform the TP Sensor Learning Procedure. Refer to TP Sensor Learning Procedure. TP Sensor Learning Procedure