Removal Procedure

Fig 1: View Of Intake Air Duct/Resonator To PCM Housing Screw

Courtesy of GENERAL MOTORS CORP.

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

Loosen the intake air duct clamps.
Remove the mass air flow (MAF) sensor and air cleaner intake duct (2) as an assembly.

Fig 2: Identifying Throttle Body Bore

Courtesy of GENERAL MOTORS CORP.

Inspect the throttle body bore (1) and throttle valve plate for deposits. 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.

Clean the throttle body bore and throttle valve plate using a clean shop towel with GM Top Engine Cleaner, P/N 1052626 Canada P/N 993026, or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or equivalent product.