Removal Procedure

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Raise and suitably support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE in General Information.
Remove the frame brace (required on extended versions).
Remove the nuts that secure the muffler to the catalytic converter pipe.
IMPORTANT: If there is damage to any part of the exhaust muffler assembly replace as an assembly.
Inspect the exhaust muffler and the front pipe of the exhaust muffler for any damage if it is to be reused.

Fig 1: Removing Muffler To Catalytic Converter Pipe Nuts
Courtesy of GENERAL MOTORS CORP.
Separate the muffler from the hanger insulators.
Remove the muffler.

Fig 2: Removing Muffler
Courtesy of GENERAL MOTORS CORP.
If there is any damage aft of the exhaust muffler:
1. 7.1. Suitably support the exhaust system.
2. 7.2. Cut the exhaust pipe (1), where the damage is located.
3. 7.3. Remove the damaged exhaust pipe and resonator.
  
  Fig 3: Removing Damaged Exhaust Pipe & Resonator
  Courtesy of GENERAL MOTORS CORP.