Express 3500 V8-4.8L (2007)
Muffler: Service and Repair
Muffler Replacement (4.3L, 4.8L, 5.3L, and 6.0L)
Removal Procedure
Caution: Refer to Protective Goggles and Gloves Caution.
Caution: Refer to Exhaust Service Caution.
Important: The muffler is serviced as one complete unit with an exhaust pipe and tail pipe. Some variations of vehicles may have an
aftermarket tail pipe added. When the vehicle is raised on the hoist it must be raised by the frame to allow the rear axle to be lowered.
1. Raise the vehicle. Refer to Vehicle Lifting.
2. If equipped with 4.3L engine with a single catalytic converter pipe, remove the nuts retaining the catalytic converter pipe from the muffler flange.