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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 921 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Replacement - Left Side (4.8L, 5.3L, 6.0L, and 6.2L) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying J 42640
    GM333146Courtesy of GENERAL MOTORS CORP.
  1. Install the J 42640  into the steering column lower access hole.
  2. Remove the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .
  3. Fully raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
    4. Fig 2: View Of Exhaust Manifold, Gasket & Catalytic Converter
    GM1708614Courtesy of GENERAL MOTORS CORP.
  4. Remove the catalytic converter to exhaust manifold nuts. (1500 series shown, 2500 series similar).
  5. Lower the vehicle part way in order to work through the wheel opening.
    6. Fig 3: View Of Spark Plug Wires
    GM1707125Courtesy of GENERAL MOTORS CORP.
  6. Remove the spark plug wires from the spark plugs.
    1. Twist the spark plug wire boot a 1/2 turn.
    2. Pull only on the boot in order to remove the wire from the spark plug.
  7. Remove the spark plug wires from the ignition coils.
    1. Twist the spark plug wire boot a 1/2 turn.
    2. Pull only on the boot in order to remove the wire from the ignition coil.
    8. Fig 4: View Of Steering Shaft, Coupling Bolt & Nut
    GM1962341Courtesy of GENERAL MOTORS CORP.
  8. Mark the relationship of the upper intermediate steering shaft to the steering column.
  9. Remove the steering shaft coupling bolt (2) and nut (1) from the upper intermediate steering shaft.
  10. Separate the upper intermediate steering shaft (3) from the steering column, position both shafts out of the way.
    11. Fig 5: View Of Exhaust Manifold, Manifold Bolts & Gasket
    GM1708615Courtesy of GENERAL MOTORS CORP.
  11. Remove the exhaust manifold bolts, and exhaust manifold.
  12. Remove and discard the exhaust manifold gasket.
  13. Remove and discard the catalytic converter seal.
    14. Fig 6: View Of Exhaust Manifold Heat Shield & Bolts
    GM1708616Courtesy of GENERAL MOTORS CORP.
  14. If replacing the exhaust manifold, remove the exhaust manifold heat shield bolts, and shield from the exhaust manifold.
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