Throttle Body Service

REMOVAL PROCEDURE




1. Remove the IAT (Intake Air Temperature) sensor electrical connector (1) from the IAT sensor (2).




2. Remove the intake air duct assembly.




3. Remove the snap ring (3) at the air inlet screen (2) on the throttle body (1).
4. 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.

5. 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




1. Install the snap ring (3) at the air inlet screen (2) on the throttle body (1).





NOTE: Refer to Fastener Notice in Cautions and Notices.

2. Install the intake air duct assembly.

Tighten
Tighten the air intake tube clamp to 2 N.m (18 in lb).




3. Install the IAT sensor electrical connector (1) to the IAT sensor (2).