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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1705 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSCATALYTIC CONVERTER REPLACEMENT (WITH LMM)INSTALLATION PROCEDURE
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Installation Procedure

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Installation Procedure
WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis 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. CAUTION: Refer to Fastener Caution .
  4. Tighten the turbocharger exhaust pipe to catalytic converter 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 and tighten to 45 N.m (33 lb ft).
    6. Fig 3: View of Transmission Support Crossmember
    GM788013Courtesy of GENERAL MOTORS CORP.
  6. Install the transmission support crossmember.
  7. Install the transmission support crossmember bolts and tighten 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 and tighten to 40 N.m (30 lb ft).
  10. Remove the support from the transmission.
  11. Lower the vehicle.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.