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HOMESERVICE MANUALSCHEVROLET2001C3500 HD 8.1 G, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1739 (ENGINE CONTROLS - 4.3L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSTHROTTLE BODY ASSEMBLY REPLACEMENTINSTALLATION PROCEDURE
2001 Chevrolet C3500 HD 8.1 G, Automatic

Installation Procedure

2001 Chevrolet C3500 HD 8.1 G, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2001 GMC Sierra and 2001 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    CAUTION:

    Refer to Safety Glasses/Goggles in CAUTIONS AND NOTICES .

  1. Clean the gasket surface on the intake manifold.
    2. Fig 1: View Of Throttle Body & Gasket
    GM12853Courtesy of GENERAL MOTORS COMPANY
  2. Install the throttle body assembly with a new seal.
    3. Fig 2: View Of Throttle Body & Attaching Studs
    GM12852Courtesy of GENERAL MOTORS COMPANY
  3. Refer to FASTENER NOTICE in Cautions and Notices.

    Install the throttle body assembly retaining studs.

    Tighten 

    Tighten the studs to 9 N.m (80 lb in).

    4. Fig 3: View Of Throttle Position (TP) Sensor Harness Connector
    GM12885Courtesy of GENERAL MOTORS COMPANY
  4. Connect the TP sensor harness connector.
    5. Fig 4: View Of IAC Valve Electrical Connector
    GM312513Courtesy of GENERAL MOTORS COMPANY
  5. Connect the IAC valve harness connector.
    6. Fig 5: View Of Throttle Body Bracket
    GM424533Courtesy of GENERAL MOTORS COMPANY
  6. Install the accelerator cable routing bracket using the mounting nuts.

    Tighten 

    Tighten the nuts to 9 N.m (80 lb in).

  7. Install accelerator bracket and bracket nuts.

    Tighten 

    Tighten the nuts to 12 N.m (106 lb in).

    8. Fig 6: Identifying Accelerator Cable/Throttle Body Lever
    GM325556Courtesy of GENERAL MOTORS COMPANY
RENDER: 1.0x

NO RELATED

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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.