Throttle Body Service

REMOVAL PROCEDURE




1. Disconnect the MAF sensor electrical connector.

NOTE: Do not damage the MAF sensor screen. A damaged screen could restrict airflow and lead to a driveability concern.

2. Remove the MAF sensor bolts and intake air duct (2) as an assembly.

Throttle Body And Coolant Pipes:

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

NOTE: 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

NOTE: The outlet to 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. An improperly installed inlet duct assembly or air cleaner assembly may cause misalignment.




1. Install the MAF sensor with three bolts and intake air duct (2) as an assembly.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Tighten
Tighten the MAF sensor attaching bolts to 8 N.m (71 lb in).

2. Connect the MAF sensor electrical connector to the MAF sensor.