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HOMESERVICE MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 343 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSEXHAUST PIPE REPLACEMENTINSTALLATION PROCEDURE
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8

Installation Procedure

2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Installation Procedure
WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install new gaskets to the muffler flange and the catalytic converter pipe flange.
  2. Install the exhaust pipe.
    CAUTION: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fastener 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.
  3. Install the nuts for the muffler to the exhaust pipe.
    Fig 1: Installing New Gaskets, Exhaust Pipe & Nuts
    G01699414Courtesy of GENERAL MOTORS CORP.
  4. Install the nuts for the catalytic converter pipe to exhaust pipe.

    Tighten 

    Tighten the flange nuts to 48 N.m (35 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.
  5. Verify the exhaust system for proper clearance and the alignment of all components.
  6. Lower the vehicle.
    Fig 2: Installing Nuts For Catalytic Converter Pipe
    G01699415Courtesy of GENERAL MOTORS CORP.
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.