LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 8.1L >> Repair Instructions >> Throttle Body Assembly Replacement >> Installation Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Installation Procedure

  1. Install a new throttle body gasket.
  2. Install the throttle body assembly.
    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.

    Important:  Always use a torque wrench in order to obtain the proper torque.

  3. Install the throttle body attaching bolts.

    Tighten 

    Tighten the throttle body attaching bolts to 10 N.m (89 lb in).

    Important:  Ensure that the electrical connector to throttle body motor and the connector seal are properly installed and not damaged.

  4. Connect the TP sensor harness connector.
  5. Connect the throttle actuator motor harness connector.
  6. Install the air induction assembly to the throttle body.
  7. With the vehicle not in reduced engine power, turn ON the ignition with the engine OFF. Inspect for complete throttle opening and closing positions. Use a scan tool to monitor the throttle angles while operating the accelerator pedal to open and close the throttle. The accelerator pedal should operate freely without binding between full closed throttle and wide open throttle.
  8. Start the engine.
    Fig 1: Throttle Body & Gasket
    G01598894Courtesy of GENERAL MOTORS CORP.