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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1054 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left (6.6L (LB7) Engine) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the exhaust pipe heat shield bolts.
    Fig 1: Exhaust Pipe Heat Shield And Bolts (6.6L (LB7) Engine)
    GM668426Courtesy of GENERAL MOTORS CORP.
  3. Reposition the heat shield to the side in order to access the exhaust pipe to exhaust manifold bolts.
    4. Fig 2: Exhaust Pipe To Exhaust Manifold Bolts (6.6L (LB7) Engine)
    GM785649Courtesy of GENERAL MOTORS CORP.
  4. Remove the exhaust pipe to exhaust manifold bolts (2).
  5. Lower the vehicle in order to work through the front wheelhouse opening.
  6. Remove the wheelhouse panel. Refer to Wheelhouse Panel Replacement in Body Front End.
  7. Remove the front tire and wheel. Refer to Tire and Wheel Removal and Installation in Tires and Wheels.
  8. Remove the charged air cooler outlet duct. Refer to Charged Air Cooler Hoses/Pipes Replacement in Engine Mechanical - 6.6L (LB7).
    9. Fig 3: Exhaust Manifold Heat Shield Bolts (6.6L (LB7) Engine)
    GM660369Courtesy of GENERAL MOTORS CORP.
  9. Remove the exhaust manifold heat shield bolts.
  10. Remove the exhaust manifold heat shield.
    11. Fig 4: Exhaust Manifold Bolts/Nuts (6.6L (LB7) Engine)
    GM660370Courtesy of GENERAL MOTORS CORP.
  11. Remove the exhaust manifold bolts/nuts.
  12. Remove the exhaust manifold.
    1. Remove the manifold from the rear stud.
    2. Remove the manifold from the front stud.
    3. Slide the manifold out the bottom, past the oil filter.
  13. Remove and discard the exhaust manifold gasket.
  14. Clean and inspect the exhaust manifold. Refer to Exhaust Manifold Cleaning and Inspection in Engine Mechanical - 6.6L (LB7).
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