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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1036 (Engine Exhaust System) >> Repair Instructions >> Exhaust Manifold Pipe Replacement (6.0L - Cab/Chassis) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Transmission Mount Nuts
    GM647997Courtesy of GENERAL MOTORS CORP.
  1. Remove the heated oxygen sensor (HO2S). Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (1500 Series) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series) or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (2500 Series - Cab/Chassis) .
  2. Support the transmission with a suitable transmission jack.
  3. Remove the transmission mount to transmission support nuts.
  4. Using the transmission jack, raise the transmission up off of the transmission support.
    5. Fig 2: View Of Transmission Support Crossmember & Bolts
    GM1856226Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission support crossmember bolts.
  6. Remove the transmission support crossmember.
    7. Fig 3: View Of Exhaust Muffler, Exhaust Manifold Pipe, Gasket & Nuts
    GM1856230Courtesy of GENERAL MOTORS CORP.
  7. Remove the exhaust muffler to exhaust manifold pipe nuts (1).
    8. Fig 4: View Of Exhaust Manifold Pipe, Gasket, Bolt & Manifold
    GM1856228Courtesy of GENERAL MOTORS CORP.
  8. Remove the exhaust manifold pipe to exhaust manifold nuts.
  9. Using the transmission jack, lower the transmission slightly.
  10. Separate any necessary exhaust muffler insulators so that the pipe may be separated from the muffler.
    11. Fig 5: View Of Exhaust Manifold Pipe
    GM1856232Courtesy of GENERAL MOTORS CORP.
  11. Remove the exhaust manifold pipe.
  12. Discard the exhaust manifold pipe gasket.
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