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Throttle Body: Removal

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  1. Raise and support the vehicle. Partially drain the cooling system in order to allow the hoses at the throttle body to be removed. Lower the vehicle. Remove the air intake duct. See Figure. Disconnect the MAF/IAT sensor electrical connector. Disconnect the Throttle Actuator Control (TAC) Motor electrical connector. See Fig 1. Disconnect the Throttle Position (TP) sensor electrical connector. See Fig 2.
  2. Disconnect the crankcase ventilation hose from the throttle body. Remove the throttle body attaching bolts. Disconnect the coolant hoses from the throttle body. Remove the throttle body and the gasket. See Figure. Discard the throttle body gasket. Do not reuse the throttle body gasket. Inspect the crankcase ventilation hose and the tube. Replace any damaged components. Inspect the throttle body bore and the throttle valve plate for deposits. If necessary, open the throttle valve to inspect all surfaces.
    Fig 1: Locating Throttle Actuator Control Motor Connector
    G00209093Courtesy of GENERAL MOTORS CORP.
    Fig 2: Locating Throttle Position Sensor Connector
    G00209096Courtesy of GENERAL MOTORS CORP.
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