Removal Procedure

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

CAUTION: In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

CAUTION: Approved safety glasses and gloves should be worn when performing this procedure to reduce the chance of personal injury.

Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
Remove the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement
Disconnect the heated oxygen sensor at the pigtail.

Fig 1: Oxygen Sensor Wiring Harness Heat Shield
Courtesy of GENERAL MOTORS CORP.
Remove the heated oxygen sensor if replacement is necessary. Refer to HEATED OXYGEN SENSOR .
Remove the four nuts securing the catalytic converter to the rear exhaust manifold pipe.
Remove the catalytic converter gasket. Do not reuse the gasket.
Suitably support the exhaust system.
Remove the two bolts securing the center exhaust hangers to the rear suspension support brackets.

Fig 2: Rear Suspension Support Brackets
Courtesy of GENERAL MOTORS CORP.
Remove the two bolts securing the rear exhaust hanger brackets to the rear compartment rails.
With the aid of an assistant, Lower the exhaust system.

Fig 3: Rear Exhaust Hanger Brackets, Rear Compartment Rails & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the two nuts securing the rear exhaust hangers to the rear exhaust hanger brackets.
Remove the rear exhaust hanger brackets from the rear exhaust hangers.

Fig 4: Rear Exhaust Hanger & Brackets
Courtesy of GENERAL MOTORS CORP.