Express 3500 V8-4.8L (2007)
Catalytic Converter: Service and Repair
Catalytic Converter Replacement (Dual Exhaust - Left)
Catalytic Converter Replacement (Dual Exhaust - Left)
Removal Procedure
1. Raise the vehicle. Refer to Vehicle Lifting.
2. Disconnect the oxygen sensors.
3. Remove the exhaust hanger bolts and hanger from the vehicle.
Caution: Refer to Exhaust Service Caution.
Caution: Refer to Protective Goggles and Gloves Caution.
4. Remove the nuts retaining the exhaust pipe flange to the catalytic converter pipe.
5. Remove the nuts retaining the exhaust pipe flange to the muffler.
6. Remove the exhaust pipe.
7. Remove the flange gasket.
Installation Procedure
Notice: Refer to Fastener Notice.
1. Remove the oxygen sensors and install into the new exhaust pipe.
Tighten the sensors to 42 N.m (31 lb ft).