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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 >> Catalytic Converter Replacement (6.6L) >> 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 Transmission Mount Nuts
    GM647997Courtesy of GENERAL MOTORS CORP.
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Support the transmission with a suitable transmission jack.
  3. Remove the transmission mount to transmission support nuts.
  4. Raise the transmission off of the transmission support.
    5. Fig 2: Transmission Support Crossmember (6.0L, 6.6L, and 8.1L Engines)
    GM788013Courtesy of GENERAL MOTORS CORP.
  5. Remove the transmission support crossmember bolts.
  6. Remove the transmission support crossmember.
    7. Fig 3: View Of Catalytic Converter, Particulate Filter & Nuts
    GM1875266Courtesy of GENERAL MOTORS CORP.
  7. Remove the catalytic converter to particulate filter nuts.
    8. Fig 4: View Of Turbocharger Exhaust Pipe & Clamps
    GM1875268Courtesy of GENERAL MOTORS CORP.
  8. Loosen the turbocharger exhaust pipe to catalytic converter clamp.
  9. Slide the clamp up onto the turbocharger exhaust pipe.
  10. Remove the catalytic converter.
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