Installation Procedure

Install the exhaust manifold pipe seal(s).
Raise the catalytic converter or exhaust manifold pipe using the adjustable jackstands.
Install the exhaust hanger mounting bracket bolts.
Install the left exhaust manifold pipe nuts.
NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Tighten
- Tighten the exhaust pipe hanger bracket bolts to 12 N.m (106 lb in).
- Tighten the exhaust manifold pipe nuts to 50 N.m (39 lb ft).

Fig 1: Installing Left Exhaust Manifold Pipe Nuts

Courtesy of GENERAL MOTORS CORP.

Install the right exhaust manifold pipe nuts.
Tighten

Tighten the nuts to 50 N.m (39 lb ft).

Fig 2: Installing Right Exhaust Manifold Pipe Nuts

Courtesy of GENERAL MOTORS CORP.

Fig 3: Installing Oxygen Sensor Electrical Connector

Courtesy of GENERAL MOTORS CORP.

Connect the CPA retainer.
Remove the adjustable jackstands from catalytic converter or exhaust manifold pipe.
Lower the vehicle.