Removal Procedure

NOTE: To prevent internal damage to the flexible coupling of the catalytic converter assembly, the converter must be supported. The vertical movement at the rear of the catalytic converter assembly must not exceed 6 degrees up or down.

Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
Use a utility stand in order to support the catalytic converter.

Fig 1: View Of Catalytic Converter Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the catalytic converter bolts.
Remove the catalytic converter gasket.

Fig 2: Locating Exhaust Hanger Insulators

Courtesy of GENERAL MOTORS CORP.

Remove the exhaust hanger insulators from the muffler.
If the vehicle is equipped with All-Wheel-Drive (AWD), use a utility stand in order to support and lower the crossmember. Refer to Crossmember Replacement - Rear Suspension in Frame and Underbody.
Remove the muffler towards the front of the vehicle.
Clean the catalytic converter flange and the muffler flange.