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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 717 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSMUFFLER REPLACEMENT (SINGLE)REMOVAL PROCEDURE
1999 GMC Forward Control 5.7 R, Automatic

Removal Procedure

1999 GMC Forward Control 5.7 R, AutomaticSECTION Removal Procedure
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. Raise and support the vehicle. Refer to LIFTING & JACKING THE VEHICLE .
    NOTE: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.
  2. Support the exhaust system.
  3. Remove the catalytic converter bolts.
  4. Remove the catalytic converter gasket.
    Fig 1: Catalytic Converter Gasket & Bolts
    G01704119Courtesy of GENERAL MOTORS CORP.
  5. Remove the exhaust hanger insulators from the exhaust muffler with exhaust pipe and tail pipe.
  6. Remove the exhaust muffler with exhaust pipe and tail pipe.
    Fig 2: Exhaust Hanger Insulators, Muffler, Pipe & Tail Pipe
    G01704120Courtesy 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.