Installation Procedure

Fig 1: Identifying Catalytic Converter Assembly Outlet Pipe Clamp

Courtesy of GENERAL MOTORS CORP.

Slide 2 service clamps (1) over the catalytic converter assembly outlet pipe.
Do not tighten at this time.

Fig 2: Identifying Catalytic Converter Assembly & Intermediate Pipe
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IMPORTANT: Ensure the O2 sensor boss is facing the right side of the vehicle.
Slide the catalytic converter assembly (1) outlet pipe over the intermediate pipe (2).

Fig 3: View Of Exhaust Pipe To Catalytic Converter
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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.
Place a NEW catalytic converter gasket over the catalytic converter studs.
NOTE: Refer to Flex Decoupler Notice.
Raise the exhaust system into position, aligning the catalytic converter with the exhaust manifold pipe.
Install the nuts securing the catalytic converter to the exhaust manifold pipe.
Do not tighten at this time.

NOTE: Refer to Fastener Notice .

Fig 4: View Of Center Exhaust Hangers & Bolts
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Install the bolts securing the center exhaust hangers to the rear suspension support brackets.
Tighten: Tighten the center exhaust hanger bolts to 30 N.m (22 lb ft).
Tighten the catalytic converter nuts.
Tighten: Tighten the catalytic converter nuts in a crisscross pattern to 25 N.m (18 lb ft).
Remove the jack from under the vehicle.

Fig 5: View Of Catalytic Converter Assembly Outlet Pipe Clamp

Courtesy of GENERAL MOTORS CORP.

Position the service clamps midway on the catalytic converter assembly outlet pipe, as close together as possible.
Rotate the clamps so the fastening ends are pointing in opposite directions.
Tighten: Tighten the service clamps to 54 N.m (40 lb ft).
Lower the vehicle.
Check the exhaust system for leaks.