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Home >> Chevrolet >> 2005 >> Chevy Express G3500, Van Passenger Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.8L, 5.3L, And 6.0L - Introduction >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Throttle Body Nuts
    GM260174Courtesy of GENERAL MOTORS CORP.
  1. Install the throttle body with a new gasket.
    2. NOTE: Refer to Fastener Notice in Cautions and Notices.
  2. Install the throttle body attaching nuts.

    Tighten:  Tighten the nuts to 10 N.m (89 lb in).

    3. Fig 2: View Of Coolant Hose At Throttle Body
    GM220620Courtesy of GENERAL MOTORS CORP.
  3. Connect the coolant hose to the throttle body.
    4. Fig 3: Identifying Coolant Air Bleed Hose At Throttle Body
    GM220621Courtesy of GENERAL MOTORS CORP.
  4. Connect the coolant hose to the vapor vent pipe.
    5. Fig 4: View Of Accelerator/Throttle Cable
    GM389031Courtesy of GENERAL MOTORS CORP.
  5. Connect the accelerator control cable and the cruise control cable to the throttle body.
    6. Fig 5: View Of TP Sensor & IAC Valve Electrical Connectors
    GM389028Courtesy of GENERAL MOTORS CORP.
  6. Connect the TP sensor and the IAC valve electrical connectors.
  7. Connect the vacuum hose to the throttle body.
  8. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  9. With the engine OFF, verify that the accelerator pedal moves freely. Depress the accelerator pedal to the floor and release the pedal.
  10. In order to reset the IAC valve, perform the following procedure:
    1. Turn ON the ignition for 10 seconds.
    2. Turn OFF the ignition for 5 seconds.
    3. Start the engine and check for the proper idle speed.
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