Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1313 (ENGINE EXHAUST SYSTEM)REPAIR INSTRUCTIONSEXHAUST HANGER MOUNTING BRACKET 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 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

Install the exhaust muffler rear hanger bracket.
NOTE: Refer to FASTENER NOTICE .
Install the inboard rear bumper impact bar bolt.
Tighten

Tighten the rear bumper impact bar bolts to 25 N.m (18.4 lb ft).
Install the exhaust pipe rear hanger insulators to the exhaust muffler rear hanger bracket.

Fig 1: Exhaust Pipe Rear Hanger Insulator & Bracket
Courtesy of GENERAL MOTORS CORP.
Install the exhaust pipe rear hanger bracket.
Install the exhaust pipe rear hanger screw.
Tighten

Tighten the exhaust pipe rear hanger screw to 25 N.m (18.4 lb ft).
Install the exhaust pipe rear hanger insulator to the exhaust pipe rear hanger bracket.
Remove the support from the exhaust system.
Inspect the exhaust system for leaks and underbody contact.
Lower the vehicle.

Fig 2: Exhaust Pipe Rear Hanger Insulator, Bracket & Screw
Courtesy 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.