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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN PASSENGER EXTENDED, 5.0 MREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 939 (ENGINE CONTROLS - 6.6L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSINTAKE AIR HEATER RELAY REPLACEMENT (CALIFORNIA)INSTALLATION PROCEDURE
2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 M

Installation Procedure

2001 Chevrolet Chevy Express G2500, Van Passenger Extended, 5.0 MSECTION Installation Procedure
WARNING: This page is about a different car, the 2001 GMC Sierra, 2001 GMC Cab & Chassis Sierra, 2001 Chevrolet Silverado, and 2001 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: IAH Relay
    GM1198942Courtesy of GENERAL MOTORS COMPANY
  1. Install the IAH relay.
    2. Fig 2: IAH Relay Assembly & Housing
    GM1198940Courtesy of GENERAL MOTORS COMPANY
  2. Install the IAH relay assembly to the housing.
    3. Fig 3: IAH Relay Controller Nuts And Washers
    GM1198938Courtesy of GENERAL MOTORS COMPANY
  3. Refer to FASTENER NOTICE in Cautions and Notices.

    Install the IAH relay controller nuts and washers.

    Tighten 

    Tighten the nuts to 5 N.m (44 lb in).

    4. Fig 4: IAH Relay Controller Cover
    GM1198936Courtesy of GENERAL MOTORS COMPANY
  4. Install the IAH relay controller cover.
    5. Fig 5: Battery Cable Boots & IAH Relay Controller Bolts
    GM1198934Courtesy of GENERAL MOTORS COMPANY
  5. Install the IAH relay controller.
  6. Install the IAH relay controller bolts (2).

    Tighten 

    Tighten the bolts to 20 N.m (15 lb ft).

  7. Install the battery cables and nuts to the IAH relay controller.

    Tighten 

    Tighten the nuts to 5 N.m (44 lb in).

    8. Fig 6: Battery Cable Boots
    GM1198931Courtesy of GENERAL MOTORS COMPANY
  8. Reposition the battery cable boots (1).
    9. Fig 7: Engine Harness Electrical Connector & IAH Relay Electrical Connector
    GM757209Courtesy of GENERAL MOTORS COMPANY
  9. Connect the IAH relay electrical connector (3).
  10. Connect the engine harness connector (2).
    11. Fig 8: View Of Upper Intake Manifold Cover, Outlet Duct & Clamp
    GM813243Courtesy of GENERAL MOTORS COMPANY
  11. Install the upper intake manifold cover.
  12. Install the upper intake manifold cover to the outlet duct.
  13. Tighten the outlet duct clamp at the upper intake manifold cover.

    Tighten 

    Tighten the clamp to 6 N.m (53 lb in).

  14. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Auxiliary Battery) , Battery Negative Cable Disconnection and Connection (Single Battery) in Engine Electrical.
RENDER: 1.0x

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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.