Exhaust System: Service and Repair

Exhaust System Replacement

Removal Procedure

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the frame brace. Refer to Frame Brace Replacement (TrailBlazer EXT, Envoy XL) Frame Brace Replacement (TrailBlazer, Envoy, Bravada) in Frame and Underbody.
3. Remove the spare tire assembly.
4. Remove the rear axle tie rod. Refer to Rear Axle Tie Rod Replacement in Rear Suspension.
5. Remove the rear axle brace. Refer to Rear Axle Brace Replacement in Rear Suspension.




6. Remove the nuts that secure the muffler to the catalytic converter.




7. Separate the exhaust system from the exhaust hanger insulators.
8. Remove the exhaust system.

Installation Procedure




1. Install the exhaust system to the vehicle and secure with the exhaust system hanger insulators.





Notice: Refer to Fastener Notice in Cautions and Notices.

2. Install the muffler to the catalytic converter and secure with the nuts.

Tighten the nuts to 45 N.m (33 lb ft).

3. Inspect the exhaust system for leaks and underbody contact.
4. Install the rear axle brace. Refer to Rear Axle Brace Replacement in Rear Suspension.
5. Install the rear axle tie rod. Refer to Rear Axle Tie Rod Replacement in Rear Suspension.
6. Install the spare tire assembly.
7. Install the frame brace. Refer to Frame Brace Replacement (TrailBlazer EXT, Envoy XL) Frame Brace Replacement (TrailBlazer, Envoy, Bravada) in Frame and Underbody.
8. Lower the vehicle.