Removal Procedure

Servicing of the mufflers, resonator or pipe requires the replacement of the exhaust system as a complete one-piece unit.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
3. Disconnect the heated oxygen sensor at the pigtail.
4. Remove the heated oxygen sensor if replacement is necessary. Refer to Heated Oxygen Sensor (HO2S) Replacement Bank 1 Sensor 2 in Engine Controls-4.6L.
Fig 1: View Of Exhaust Pipe To Catalytic Converter
Courtesy of GENERAL MOTORS CORP.
5. Remove the four nuts securing the catalytic converter to the rear exhaust manifold pipe.
6. Remove the catalytic converter gasket. Do not reuse the gasket.
7. Suitably support the exhaust system.
Fig 2: View Of Center Exhaust Hangers & Bolts
Courtesy of GENERAL MOTORS CORP.
8. Remove the two bolts securing the center exhaust hangers to the rear suspension support brackets.
Fig 3: View of Rear Exhaust Hanger Brackets to Rear Compartment Rails
Courtesy of GENERAL MOTORS CORP.
9. Remove the two bolts securing the rear exhaust hanger brackets to the rear compartment rails.
10. With the aid of an assistant, Lower the exhaust system.
Fig 4: View of Rear Exhaust Hangers to Rear Exhaust Hanger Brackets Fasteners
Courtesy of GENERAL MOTORS CORP.
11. Remove the two nuts securing the rear exhaust hangers to the rear exhaust hanger brackets.
12. Remove the rear exhaust hanger brackets from the rear exhaust hangers.