Express 3/4 Ton Van V8-6.0L VIN U (2003)
Muffler: Service and Repair
Muffler Replacement Removal Procedure
Caution: Refer to Protective Goggles and Gloves Caution in Service Precautions.
Caution: Refer to Exhaust Service Caution in Service Precautions.
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.
3. If equipped with a 4.8/5.3/6.0L engine with dual catalytic converter pipes, loosen the clamp for the right catalytic converter.
4. Remove the nuts retaining the left catalytic converter to the muffler flange.
Important: Depending on the wheel base of the vehicle and the length of the exhaust system the following procedures are required in order to
remove the muffler assembly from the vehicle.
