Installation Procedure

Fig 1: Identifying Catalytic Converter Assembly

Courtesy of GENERAL MOTORS COMPANY

Install a NEW exhaust manifold seal (1) into the groove in the left catalytic converter.
Install a NEW exhaust manifold seal (2) into the right manifold.
Position the catalytic converter (3) to the exhaust manifolds.

Fig 2: Identifying Catalytic Converter To Exhaust Manifold Nuts

Courtesy of GENERAL MOTORS COMPANY

CAUTION:

Install the catalytic converter to exhaust manifold nuts (1) and tighten to 50 N.m (37 lb ft).

Fig 3: View Of Muffler To Catalytic Converter Nuts

Courtesy of GENERAL MOTORS COMPANY

Install the muffler to catalytic converter nuts (1) and tighten to 48 N.m (35 lb ft).
Install the exhaust hanger bolts and hanger to the transmission and tighten to 50 N.m (37 lb ft).
Install the HO2S. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 , , Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 , , Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 , , and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .