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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Mechanical - 6.6L - On Vehicle Repair Instructions) >> On-Vehicle Repair Instructions >> Intake Manifold Tube 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: Charged Air Cooler Outlet Duct
    GM1653035Courtesy of GENERAL MOTORS CORP.
  5. Remove the electrical harness bolts.
    Fig 2: Identifying Electrical Harness Bolts
    GM1602057Courtesy of GENERAL MOTORS CORP.
  6. Reposition the harness clip from the intake manifold tube, as needed.
  7. Remove the air inlet tube to intake manifold tube bolt and nut.
    Fig 3: Identifying Air Inlet Tube
    GM1602059Courtesy of GENERAL MOTORS CORP.
  8. Disconnect the intake air heater electrical connector.
  9. Disconnect the manifold absolute pressure (MAP) sensor electrical connector.
  10. Remove the engine harness clip from the air inlet tube.
  11. Remove the air inlet tube nuts.
  12. Remove the air inlet tube.
    Fig 4: Air Inlet Tube
    GM1602060Courtesy of GENERAL MOTORS CORP.
  13. If necessary, remove the intake manifold tube.
    Fig 5: View Of Intake Manifold Tube
    GM1335575Courtesy of GENERAL MOTORS CORP.
  14. If necessary, remove and discard the 2 O-ring seals from the tube.
  15. Clean the gasket surfaces of the exhaust gas recirculation (EGR) cooler tube, intake manifold tube and inlet tube.
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