Installation Procedure

CAUTION: Refer to EXHAUST SYSTEM INSPECTION NOTICE.

With the aid of an assistant install the catalytic converter to the jack stands.
Raise the jack stands in order to position the catalytic converter.
Install NEW exhaust muffler gaskets.
Install ALL exhaust bolts until snug to ensure correct alignment of the catalytic converter.
Remove the adjustable jack stands.

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

CAUTION: Refer to FASTENER NOTICE .
Tighten the exhaust muffler bolts in the following sequence:
1. 6.1. Left inboard
2. 6.2. Left outboard
3. 6.3. Right inboard
4. 6.4. Right outboard
  Tighten
  
  Tighten the exhaust muffler bolts to 50 N.m (37 lb ft).
Fig 2: Installing Exhaust Muffler Bolts
Courtesy of GENERAL MOTORS CORP.
Tighten the exhaust manifold nuts.
Tighten

Tighten the exhaust manifold nuts to 20 N.m (15 lb ft).

Fig 3: Installing Exhaust Manifold Nuts
Courtesy of GENERAL MOTORS CORP.
Tighten the exhaust pipe brace lower bolts.
Tighten

Tighten the exhaust pipe brace bolts to 50 N.m (37 lb ft).

Fig 4: Installing Exhaust Pipe Brace Lower Bolts
Courtesy of GENERAL MOTORS CORP.
Tighten the exhaust pipe hanger lower bolts.
Tighten

Tighten the exhaust pipe hanger bolts to 50 N.m (37 lb ft).

Fig 5: Installing Exhaust Pipe Hanger Lower Bolts
Courtesy of GENERAL MOTORS CORP.
Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the oxygen sensor.
CAUTION: Refer to OXYGEN SENSOR NOTICE .
Install the oxygen sensors.
Tighten

Tighten the oxygen sensors to 42 N.m (30 lb ft).
Install the oxygen sensor clips to the heat shields.
Connect the oxygen sensor electrical connectors.
Install the CPA locks.
Lower the vehicle.

Fig 6: Installing Oxygen Sensors
Courtesy of GENERAL MOTORS CORP.