Removal Procedure
- Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 5.7L.
- Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
- Partially drain the cooling system in order to allow the hoses at the throttle body to be removed. Refer to Cooling System Draining and Filling in Engine Cooling.
- Lower the vehicle.
- Loosen the air cleaner outlet duct clamps (1, 2).
- Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
- Disconnect the air control valve electrical connector.
- Disconnect the throttle position (TP) sensor electrical connector.
- Disconnect the crankcase ventilation hose from the throttle body.
- Disconnect the coolant hoses from the throttle body.
- Remove the throttle body attaching bolts.
- Remove the throttle body and the gasket.
- Discard the throttle body gasket.
- Inspect the crankcase ventilation hose and the tube. Replace any damaged components.
Notice: Handle the electronic throttle control components carefully. Use cleanliness in order to prevent damage. Do not drop the electronic throttle control components. Do not roughly handle the electronic throttle control components. Do not immerse the electronic throttle control components in cleaning solvents of any type.
Important: Cover or plug any openings when servicing the throttle body in order to prevent possible contamination.
Important: Do not reuse the throttle body gasket. Install a new gasket during assembly.
Installation Procedure
- Install a new throttle body gasket.
- Connect the coolant hoses to the throttle body.
- Install the throttle body assembly.
- Install the throttle body attaching bolts.
- Connect the TP sensor electrical connector.
- Connect the crankcase ventilation hose to the throttle body.
- Connect the air control valve electrical connector.
- Install the air cleaner outlet duct and clamps (1, 2). Refer to Air Cleaner Outlet Duct Replacement .
- Connect the intake air temperature sensor electrical connector.
- Refill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
- Check for complete throttle opening and closing positions by operating the accelerator pedal. Monitor the throttle angles, using a scan tool. The accelerator pedal should operate freely without binding between full closed throttle and wide open throttle.
- Start the engine.
- Check for coolant leaks.
- Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 5.7L.
Notice: Refer to Fastener Notice in the Preface section.
Important: Always use a torque wrench in order to obtain the proper torque.
Tighten
Tighten the throttle body bolts to 12 N·m (106 lb in).
Important: Ensure that the air control valve electrical connector and the connector seal are properly installed and not damaged.
