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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) >> Installation Procedure

Installation 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: View Of Turbocharger Exhaust Pipe & Clamps
    GM1875268Courtesy of GENERAL MOTORS CORP.
  1. Apply water based lubricant to the exhaust pipe hanger bracket, in order to aid in installation.
  2. Install the catalytic converter.
  3. Slide the down turbocharger exhaust pipe to catalytic converter clamp.
    4. NOTE: Refer to Fastener Notice .
  4. Tighten the turbocharger exhaust pipe to catalytic converter clamp.

    Tighten:  Tighten the clamp to 12 N.m (106 lb in).

    5. Fig 2: View Of Catalytic Converter, Particulate Filter & Nuts
    GM1875266Courtesy of GENERAL MOTORS CORP.
  5. Install the catalytic converter to particulate filter nuts.

    Tighten:  Tighten the nuts to 45 N.m (33 lb ft).

    6. Fig 3: Transmission Support Crossmember (6.0L, 6.6L, and 8.1L Engines)
    GM788013Courtesy of GENERAL MOTORS CORP.
  6. Install the transmission support crossmember.
  7. Install the transmission support crossmember bolts.

    Tighten:  Tighten the bolts to 95 N.m (70 lb ft).

    8. Fig 4: Identifying Transmission Mount Nuts
    GM647997Courtesy of GENERAL MOTORS CORP.
  8. Lower the transmission onto the transmission support.
  9. Install the transmission mount to transmission support nuts.

    Tighten:  Tighten the bolts to 40 N.m (30 lb ft).

  10. Remove the support from the transmission.
  11. Lower the vehicle.
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