Removal Procedure

IMPORTANT: Do not for any reason, insert a screwdriver or other small hand tools into the throttle body to hold open the throttle plate, as the wedge inside the throttle body could be damaged.

Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

Fig 1: View Of Accelerator/Throttle Cable

GM389031

Courtesy of GENERAL MOTORS CORP.

Disconnect the accelerator control cable and the cruise control cable from the throttle body.
Disconnect the vacuum hose from the throttle body.

Fig 2: View Of TP Sensor & IAC Valve Electrical Connectors

GM389028

Courtesy of GENERAL MOTORS CORP.

Disconnect the throttle position (TP ) sensor and idle air control (IAC) valve harness connectors.

Fig 3: View Of Coolant Hose At Throttle Body

GM220620

Courtesy of GENERAL MOTORS CORP.

Disconnect the coolant hose from the throttle body.

Fig 4: Identifying Coolant Air Bleed Hose At Throttle Body

GM220621

Courtesy of GENERAL MOTORS CORP.

Disconnect the coolant hose from the vapor vent pipe.

Fig 5: Throttle Body Nuts

GM260174

Courtesy of GENERAL MOTORS CORP.

Remove the throttle body attaching nuts.
Remove the throttle body and the gasket. Discard the gasket.

NOTE: In order to prevent damage to the sealing surfaces, carefully use sharp tools in cleaning the old gasket from the aluminum surfaces.

IMPORTANT:

DO NOT soak the throttle body in a cold immersion type cleaner. The throttle plate has a factory applied sealing compound. The DAG material is applied to the outside edge of the plate and the throttle bore to prevent air bypass at closed throttle. Strong solvents or brushing removes the material. To clean the throttle body following disassembly, use a spray type cleaner such as GM X-66A or GM P/N 1052626. Use a shop towel to remove heavy deposits.
The TP sensor and the IAC valve are electrical components, and should NOT come in contact with solvent or cleaner in order to avoid damage.

Clean the gasket sealing surfaces.