Removal Procedure
- Remove the air intake duct.
- Disconnect the accelerator control cable and the cruise control cable from the throttle body.
- Disconnect the vacuum hose from the throttle body.
- Disconnect the throttle position (TP ) sensor and idle air control (IAC) valve electrical connectors.
- Disconnect the coolant hose from the throttle body.
- Disconnect the coolant hose from the vapor vent pipe.
- Remove the throttle body attaching nuts.
- Remove the throttle body and the gasket. Discard the gasket.
- Clean the gasket sealing surfaces.
Notice: 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 valve has a factory applied sealing compound DAG material is
applied to the outside edge of the valve 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, as damage may result.
Installation Procedure
- Install the throttle body with a new gasket.
- Install the throttle body attaching nuts.
- Connect the coolant hose to the throttle body.
- Connect the coolant hose to the vapor vent pipe.
- Connect the accelerator control cable and the cruise control cable to the throttle body.
- Connect the TP sensor and the IAC valve electrical connectors.
- Connect the vacuum hose to the throttle body.
- Install the air intake duct.
- With the engine OFF, verify that the accelerator pedal moves freely. Depress the accelerator pedal to the floor and release the pedal.
- Perform the Idle Learn Procedure. Refer to Idle Learn .
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten
Tighten the nuts to 10 N·m (89 lb in).
