2004 Chevrolet Avalanche 2500FACTORY OEM SERVICE PROCEDURE

Installation Procedure

    Fig 1: View Of Throttle Body, Gasket & Nuts
    GM858205Courtesy of GENERAL MOTORS CORP.
  1. Install a NEW throttle body gasket.
  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: View Of Generator, Injector Harness, Ignition Coil Harness, ETC & Purge Valve Solenoid Electrical Connectors
    GM1235689Courtesy 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.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.