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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 402 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSCATALYTIC CONVERTER HEAT SHIELD REPLACEMENTINSTALLATION PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Installation Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Position the heat shield (2) to the floor panel in the following order:
    1. 1.1. Slide the heat shield (2) to the right, under the oxygen sensor wiring harness heat shield.
    2. 1.2. Push the heat shield (2) upward, over the retaining stud (1).
    3. 1.3. Align the holes in the heat shield (2) with the holes in the floor panel.
  2. Using a rivet gun, fasten both the oxygen sensor wiring harness heat shield and the catalytic converter heat shield (2) to the floor panel with a single rivet (3).
  3. Install the remaining rivets.
    4. Fig 1: Installing Catalytic Converter Heat Shield
    G01818249Courtesy of GENERAL MOTORS CORP.
  4. Install the exhaust system. Refer to Exhaust System Replacement 
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.