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Home >> GMC >> 2004 >> Sierra 2500 HD, 2D Pickup, 8.1 G, RWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L (Introduction) >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure

Installation Procedure

  1. Install a NEW throttle body gasket.
    Fig 1: Throttle Body And Gasket
    GM858205Courtesy of GENERAL MOTORS CORP.
  2. Install the throttle body.
    NOTE: Refer to Fastener Notice in Cautions and Notices.
  3. Install the throttle body nuts.

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

    4. Fig 2: Engine Wiring Harness And Connectors
    GM750525Courtesy of GENERAL MOTORS CORP.
  4. Connect the throttle actuator motor electrical connector (5).
  5. Install the intake air resonator. Refer to Intake Air Resonator Replacement .
  6. Connect a scan tool in order to test for proper throttle-opening and throttle-closing range.
  7. Operate the accelerator pedal and monitor the throttle angles. The accelerator pedal should operate freely, without binding, between a closed throttle, and a wide open throttle (WOT).
  8. Verify that the vehicle meets the following conditions:
    • The vehicle is not in a reduced engine power mode.
    • The ignition is ON.
    • The ignition is OFF.
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