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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1385 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSFLOOR PANEL HEAT SHIELD REPLACEMENTREMOVAL PROCEDURE
2003 Chevrolet TrailBlazer 4.2 S, 4WD

Removal Procedure

2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Removal Procedure
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Yukon, 2002 Chevrolet Tahoe, 2002 Chevrolet Suburban, and 2002 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View of Exhaust Front Heat Shield
    GM707400Courtesy of GENERAL MOTORS CORP.
  1. Remove the exhaust manifold pipe, if necessary. Refer to Exhaust Manifold Pipe Replacement (6.0L, and 8.1L Engines) .
  2. Remove the catalytic converter, if necessary. Refer to Catalytic Converter Replacement (4.8L and 5.3L Engines)  or Catalytic Converter Replacement (6.0L and 8.1L Engines) .
  3. Remove the exhaust front heat shield nuts.
  4. Remove the exhaust front heat shield from the studs.
    5. Fig 2: View of Crew Cab Pick-up Truck Exhaust Heat Shields
    GM707411Courtesy of GENERAL MOTORS CORP.
  5. If vehicle is a crew cab pick-up truck, remove the exhaust heat shield nuts.
  6. Remove the exhaust heat shield(s) from the studs.
    7. Fig 3: View of SUV Exhaust Heat Shield
    GM707415Courtesy of GENERAL MOTORS CORP.
  7. If vehicle is a sport utility vehicle, remove the exhaust heat shield nuts.
  8. Remove the exhaust heat shield from the studs.
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.