Muffler: Service and Repair

Exhaust Muffler Replacement (5.3L LS4)

Removal Procedure

Important: The muffler is serviced as a complete assembly and cannot be serviced separately.





1. Remove the catalytic converter. Refer to Catalytic Converter Replacement (V6) (Service and Repair)Catalytic Converter Replacement (LS4) (Service and Repair).
2. Support the exhaust system.
3. With the aid of an assistant, remove the exhaust system from the exhaust hangers.
4. Clean the catalytic converter and the muffler mating surfaces.

Installation Procedure




1. With the aid of an assistant, install the muffler to the exhaust hangers.
2. Remove the support from the exhaust system.
3. Install the catalytic converter. Refer to Catalytic Converter Replacement (V6) (Service and Repair)Catalytic Converter Replacement (LS4) (Service and Repair).