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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - 6.6L - Introduction (2 Of 2)) >> Repair Instructions >> Intake Air Heater (IAH) Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  3. Using a pick or a small flat-bladed screw driver, remove and discard the quick connect fitting clip from the charged air cooler outlet duct.
  4. Remove the charged air cooler outlet duct from the intake.
    Fig 1: Removing Charged Air Cooler Outlet Duct
    GM1653035Courtesy of GENERAL MOTORS CORP.
  5. Remove the electrical harness bolts.
    Fig 2: Removing Electrical Harness Bolts
    GM1602057Courtesy of GENERAL MOTORS CORP.
  6. Reposition the harness clip from the intake manifold tube, as needed.
  7. Remove the engine harness power lead nut (2) from the intake air heater stud.
    Fig 3: Disconnecting Engine Harness Power Lead
    GM1653262Courtesy of GENERAL MOTORS CORP.
  8. Remove the engine harness power lead (1) from the intake air heater stud.
    9. Fig 4: Disconnecting Air Inlet Tube From Intake Manifold Tube
    GM1602059Courtesy of GENERAL MOTORS CORP.
  9. Remove the air inlet tube to intake manifold tube bolt and nut.
  10. Disconnect the intake air heater electrical connector.
  11. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
  12. Remove the engine harness clip from the air inlet tube.
  13. Remove the air inlet tube nuts.
    Fig 5: Removing Air Inlet Tube
    GM1602060Courtesy of GENERAL MOTORS CORP.
  14. Remove the air inlet tube.
    15. Fig 6: Removing Intake Air Heater
    GM1602066Courtesy of GENERAL MOTORS CORP.
  15. Remove the intake air heater bolts.
  16. Separate the air inlet tube from the intake air heater.
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