Installation ProcedureThrottle Body Service

Fig 1: View Of TP Sensor And IAC Valve Connectors

Courtesy of GENERAL MOTORS CORP.

NOTE: Use care when cleaning the old gasket from the aluminum surfaces in order to prevent damage to the sealing surfaces.

Clean the gasket mating surface on the intake manifold.

NOTE: Do not subject a throttle body assembly which contains the following components to an immersion cleaner or a strong solvent:

Throttle position (TP) sensor
Idle air control (IAC) valve
Sealed throttle shaft bearings

The cleaners will damage the electric components or sensors.
The cleaners will damage some of these components that contain seals or O-rings.
Solvents can wash away or break down the grease used on non-serviceable throttle shaft bearings.
Never use a wire brush or scraper to clean the throttle body. A wire brush or sharp tools may damage the throttle body components.
Do not use a cleaner that contains methyl ethyl ketone. This extremely strong solvent may damage components and is not necessary for this type of cleaning.

Clean the throttle body.
Install the TP sensor.
Install the IAC valve.

Fig 2: View Of Throttle Body Assembly And Retaining Bolts

Courtesy of GENERAL MOTORS CORP.

Install the throttle body assembly with a new gasket to the intake manifold.

NOTE: Refer to Fastener Notice .

Install the throttle body retaining bolts.
Tighten: Tighten the throttle body retaining bolts to 15 N.m (11 lb ft).
Install the coolant hoses.
Connect the vacuum hoses to the throttle body.

Fig 3: View Of Throttle Body And Intake Manifold

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Make sure the throttle control cables do not hold the throttle open. With the engine OFF, check to see that the accelerator pedal is free.

Connect the throttle cables.
Install the air intake tube.
Connect the TP sensor connector and the IAC valve connector.
Connect the negative battery cable.
Fill the cooling system.