Removal Procedure

CAUTION: Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.

Fig 1: Identifying Air Intake Duct Hoses To Throttle Body

Courtesy of GENERAL MOTORS CORP.

Disconnect the air intake ducts from the throttle body.
Inspect the throttle body bore and the throttle valve plate for any deposits. It is necessary to open the throttle valve in order to inspect all of the 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 the throttle valve plate by using a clean shop towel with Top Engine Cleaner, GM P/N 1052626 (Canadian P/N 993026) or AC-Delco Carburetor Tune-Up Conditioner, P/N X66-P, or an equivalent product.