Removal Procedure
- Disconnect the negative battery cable.
- Partially drain the cooling system in order to remove the hoses at the throttle body. Refer to Cooling System Draining and Filling in Engine Cooling.
- Disconnect the IAT sensor and the MAF sensor electrical connectors.
- Remove the air intake duct.
- Disconnect the TP sensor (2) and IAC valve (1) electrical connectors.
- Disconnect the accelerator control cable and the cruise control cable from the throttle body.
- Disconnect the crankcase ventilation hose from the throttle body.
- Disconnect the coolant hoses from the intake manifold pipe and the radiator.
- Remove the throttle body attaching bolts.
- Remove the throttle body and the gasket. Discard the gasket.
- Clean the gasket sealing surfaces.
Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
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 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 will remove
the material. To clean the throttle body following disassembly, use a
spray type cleaner such as GM X-66A or GM 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 bolts.
- Connect the coolant hoses to the intake manifold pipe and the radiator.
- Connect the crankcase ventilation hose to the throttle body.
- Connect the accelerator control cable and the cruise control cable.
- Connect the TP sensor (2) and the IAC valve (1) electrical connectors.
- Install the air intake duct.
- Connect the IAT sensor and the MAF sensor electrical connectors.
- Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
- Connect the negative battery cable.
- With the engine OFF, check to see that the accelerator pedal is free. Depress the accelerator pedal to the floor and release.
- 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 throttle body attaching bolts to 12 N·m (106 lb in).
