SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1877 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSCATALYTIC CONVERTER REPLACEMENTINSTALLATION 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 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Catalytic Converter To Muffler Nuts
    GM1885660Courtesy of GENERAL MOTORS CORP.
  1. Install the catalytic converter (2) along with a NEW gasket to the exhaust manifold.
  2. Position and join the exhaust pipe to the catalytic converter studs.
    3. CAUTION: Refer to Fastener Caution .
  3. Install the catalytic converter to muffler nuts and tighten to 17 N.m (13 lb ft).
    4. Fig 2: Catalytic Converter To Exhaust Manifold Nuts
    GM1885654Courtesy of GENERAL MOTORS CORP.
  4. Install the catalytic converter to exhaust manifold nuts (1) and tighten to 50 N.m (37 lb ft).
  5. Install the heated oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Sensor 2 .
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.