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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1401 (Engine Mechanical - 6.6L (2 Of 5)) >> Repair Instructions - On Vehicle >> Intake Manifold Tube Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative battery cables. Refer to Battery Negative Cable Disconnection and Connection (With Single Battery) or Battery Negative Cable Disconnection and Connection (With Auxiliary Battery) or Battery Negative Cable Disconnection and Connection (With Dual Batteries) .
    2. Fig 1: View Of Engine Wiring Harness Lead, Nut & Cover
    GM1871196Courtesy of GENERAL MOTORS CORP.
  2. Open the intake air heater (IAH) harness lead cover (2).
  3. Remove the engine wiring harness lead nut (1) from the IAH stud.
  4. Remove the engine wiring harness lead (3) from the IAH stud.
    5. Fig 2: View Of Electrical Harness Bolts
    GM1873415Courtesy of GENERAL MOTORS CORP.
  5. Remove the electrical harness bolts (1).
  6. Reposition the harness clip from the intake manifold tube, as needed.
    7. Fig 3: View Of Air Inlet Tube To Intake Manifold Tube Bolt & Nut
    GM1873422Courtesy of GENERAL MOTORS CORP.
  7. Remove the air inlet tube to intake manifold tube bolt and nut.
    8. Fig 4: View Of Air Inlet Tube & Components
    GM1873444Courtesy 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 and bolt.
  12. Remove the air inlet tube.
    13. Fig 5: View Of Intake Manifold Tube
    GM1873384Courtesy of GENERAL MOTORS CORP.
  13. If necessary, remove the intake manifold tube.
  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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