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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 906 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSMUFFLER REPLACEMENT (UTILITY 4.3L)INSTALLATION PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Installation Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Installation Procedure
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the muffler and NEW gasket to the vehicle.
  2. Connect the insulator to the muffler and tail pipe hanger.
    Fig 1: Connecting Insulator To Muffler And Tail Pipe Hanger
    G01979464Courtesy of GENERAL MOTORS CORP.
  3. Connect the insulators to the muffler hanger (4-door utilities).
    Fig 2: Connecting Insulators To Muffler Hanger (4-Door Utilities)
    G01979465Courtesy of GENERAL MOTORS CORP.
  4. Connect the insulator to the tail pipe hanger.
    Fig 3: Connecting Insulator To Tail Pipe Hanger
    G01979466Courtesy 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.