Installation Procedure

NOTE: When inspecting or replacing exhaust system components, make sure there is adequate clearance from all points on the underbody to prevent overheating of the floor pan and possible damage to the passenger compartment insulation and trim materials.

Slide the crossover pipe into the exhaust muffler.
Install the crossover pipe over the studs on the left and right catalytic converters.
Slide the crossover pipe forward to align the components.
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.
Install the catalytic converter nuts (1) (right side).

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

Tighten

Tighten the catalytic converter nuts (1) (right side) to 25 N.m (18 ft lbs).
Install the catalytic converter nuts (1) (left side).

Fig 2: Installing Catalytic Converter Nuts
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the catalytic converter nuts (1) (left side) to 25 N.m (18 ft lbs).
Tighten the exhaust manifold pipe nuts (1) (right side).

Fig 3: Tighten Exhaust Manifold Pipe Nuts
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the exhaust manifold pipe nuts (1) (right side) to 35 N.m (26 ft lbs).
Tighten the exhaust manifold pipe nuts (1) (left side).

Fig 4: Tightening Exhaust Manifold Pipe Nuts
Courtesy of GENERAL MOTORS CORP.

Tighten

Tighten the exhaust manifold pipe nuts (1) (left side) to 35 N.m (26 ft lbs).
Remove the catalytic converter hanger.

Fig 5: Removing Catalytic Converter Hanger
Courtesy of GENERAL MOTORS CORP.
Remove the catalytic converter hanger bolts.
Tighten

Tighten the catalytic converter hanger bolts to 41 N.m (30 ft lbs).
Lower the vehicle.