Envoy 2WD V8-5.3L (2007)
Muffler: Service and Repair
Muffler Replacement
Removal Procedure
1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
Important: Do not reuse any component of the exhaust system that is corroded or damaged.
Important: When replacing the muffler in a vehicle with the LL8 engine, the resonator and tailpipe must also be ordered. The 2 pieces
may be attached with a clamp.
2. Inspect the exhaust system components to determine if they can be reused.
3. Remove the frame brace. Refer to Frame Brace Replacement (TrailBlazer EXT, Envoy XL) Frame Brace Replacement (TrailBlazer, Envoy,
Bravada).
4. Remove the nuts that secure the muffler to the catalytic converter pipe.
5. Separate the muffler and the tail pipe assembly from the hanger insulators.
6. Lower the muffler and tail pipe assembly.
7. Suitably support the exhaust system.
8. Cut the exhaust pipe at the dashed line (1).
9. Remove the muffler from the tail pipe.
Installation Procedure