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HOMESERVICE MANUALSCHEVROLET2006SUBURBAN C2500, 6.0 UREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 231 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSCATALYTIC CONVERTER REPLACEMENT (4.3L)INSTALLATION PROCEDURE
2006 Chevrolet Suburban C2500, 6.0 U

Installation Procedure

2006 Chevrolet Suburban C2500, 6.0 USECTION Installation Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the oxygen sensors as necessary. Refer to OXYGEN SENSOR .
  2. Position the catalytic pipe to the vehicle.
  3. Install the retaining nuts to the front of the muffler. Do not tighten the nuts.
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  4. Install the new seals, the nuts and the exhaust pipe flange to exhaust manifold.

    Tighten 

    • Tighten the exhaust pipe flange to exhaust manifold nuts to 65 N.m (48 ft lbs).
    • Tighten the catalytic converter to muffler retaining nuts to 48 N.m (35 ft lbs).
      Fig 1: Installing Nuts Retaining Catalytic Pipe To Muffler
      G02080467Courtesy of GENERAL MOTORS CORP.
  5. Connect the HO2S electrical connections.
  6. Install the exhaust hanger and bolts to the transmission.

    Tighten 

    Tighten the bolts to 17 N.m (13 ft lbs).

    CAUTION: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.
  7. Verify the exhaust system for proper clearance and the alignment of all components.
  8. Lower the vehicle.
    Fig 2: Connecting HO2S Electrical Connections
    G02080468Courtesy of GENERAL MOTORS CORP.
RENDER: 1.0x

NO RELATED

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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.