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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1732 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSEXHAUST PIPE REPLACEMENT - LEFT (6.6L ENGINE)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 Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Install the exhaust pipe with a NEW gasket to the turbocharger. Align the tab on the gasket at the turbocharger to face inward.

    To aid in installation temporarily install an exhaust pipe to exhaust manifold bolt.

    NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
  2. Install the exhaust pipe to turbocharger bolts (1).

    Tighten 

    Tighten the bolts to 53 N.m (39 lb ft).

  3. Install the exhaust pipe heat shield but do not install the bolts.
  4. Raise the vehicle.
  5. Install the exhaust pipe with a NEW gasket to the exhaust manifold. Align the tabs on the gasket to face outward.
  6. Install the exhaust pipe to exhaust manifold bolts (2).

    Tighten 

    Tighten the bolts to 53 N.m (39 lb ft).

    Fig 1: Installing Exhaust Pipe, Gasket & Bolts - Left (6.6L)
    G02133556Courtesy of GENERAL MOTORS CORP.
  7. Install the exhaust pipe heat shield bolts.

    Tighten 

    Tighten the bolts to 8 N.m (71 lb in).

    Fig 2: Installing Exhaust Pipe Heat Shield Bolts - Left (6.6L)
    G02133557Courtesy of GENERAL MOTORS CORP.
  8. Install the left side exhaust heat shield (3) at the dash panel.
  9. Install the heat shield nuts (2).

    Tighten 

    Tighten the nuts to 9 N.m (80 lb in).

  10. Install the turbocharger exhaust pipe. Refer to Turbocharger Exhaust Pipe Replacement (6.6L Engine) .
    Fig 3: Installing Left Exhaust Heat Shield & Nuts (6.6L)
    G02133558Courtesy 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.