Installation Procedure

Install the heated oxygen sensors (HO2S) as necessary.
Install the catalytic converter and NEW gaskets to the vehicle.
Install the catalytic converter to the catalytic converter rubber hangers.

Fig 1: Installing Catalytic Converter To Catalytic Converter Rubber Hangers
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
Install the catalytic converter to exhaust manifold flange nuts.
Tighten

Tighten the catalytic converter to exhaust manifold nuts to 53 N.m (39 lb ft).

Fig 2: Installing Catalytic Converter To Exhaust Manifold Flange Nuts
Courtesy of GENERAL MOTORS CORP.
Install the muffler and NEW gasket to the catalytic converter.
Install the muffler to the catalytic converter flange nuts.
Tighten

Tighten the muffler to the catalytic converter flange nuts to 40 N.m (30 lb ft).

Fig 3: Installing Muffler And New Gasket To Catalytic Converter
Courtesy of GENERAL MOTORS CORP.
Connect the post-converter heated oxygen sensor (HO2S) electrical connection.

Fig 4: Connecting Post-Converter Heated Oxygen Sensor (HO2S) Electrical Connection
Courtesy of GENERAL MOTORS CORP.
Connect the RH pre-converter heated oxygen sensor (HO2S) electrical connection.

Fig 5: Connecting RH Pre-Converter Heated Oxygen Sensor (Ho2S) Electrical Connection
Courtesy of GENERAL MOTORS CORP.
Connect the LH pre-converter heated oxygen sensor (HO2S) electrical connection.
Install the transmission support. .
Lower the vehicle.

Fig 6: Connecting LH Pre-Converter Heated Oxygen Sensor (Ho2S) Electrical Connection
Courtesy of GENERAL MOTORS CORP.