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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 908 (Engine Controls And Fuel - 6.6L (LMM) - Introduction (2 Of 2)) >> Repair Instructions >> Intake Air Heater Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra, 2007 GMC Cab & Chassis Sierra, 2007 Chevrolet Silverado, and 2007 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of IAH, Bolts & Nuts
    GM1871197Courtesy of GENERAL MOTORS CORP.
  1. Install a NEW IAH gasket.
  2. Install the IAH (3) to the intake manifold front tube studs.
  3. Install the intake manifold front tube and IAH to the intake manifold rear tube.
    4. NOTE: Refer to Fastener Notice .
  4. Install the IAH bolts (1) and nuts (2).

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

    5. Fig 2: View Of Engine Wiring Harness Lead, Nut & Cover
    GM1871196Courtesy of GENERAL MOTORS CORP.
  5. Install the engine wiring harness lead (3) to the IAH stud.
  6. Install the engine wiring harness lead nut (1) to the IAH stud.

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

  7. Close the IAH harness lead cover (2).
    8. Fig 3: View Of Intake Air Heater (IAH) & Manifold Absolute Pressure (MAP) Sensor Electrical Connectors
    GM1871195Courtesy of GENERAL MOTORS CORP.
  8. Position the engine wiring harness branches.
  9. Connect the engine wiring harness electrical connector (2) to the MAP sensor.
  10. Connect the engine wiring harness electrical connector (1) to the IAH.
    11. Fig 4: View Of Engine Wiring Harness Clip & Bolt
    GM1871193Courtesy of GENERAL MOTORS CORP.
  11. Install the engine wiring harness clip (1) to the intake manifold tube.
  12. Install the engine wiring harness clip bolt (2) to the intake manifold tube.

    Tighten:  Tighten the bolt to 4 N.m (35 lb in).

    13. Fig 5: View Of Upper Intake Manifold Brace & Bolts
    GM1871113Courtesy of GENERAL MOTORS CORP.
  13. Install the upper intake manifold brace and bolts.

    Tighten:  Tighten the bolts to 24 N.m (18 lb ft).

  14. Install the EGR valve motor. Refer to Exhaust Gas Recirculation Valve Motor Replacement .
  15. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  16. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (w/Single Battery) or Battery Negative Cable Disconnection and Connection (w/Auxiliary Battery) or Battery Negative Cable Disconnection and Connection (w/Dual Batteries) .
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