Installation Procedure

Fig 1: Connecting Catalytic Converter & Resonator Inlet Pipe

Courtesy of GENERAL MOTORS CORP.

IMPORTANT: Use care not to over extend the heated oxygen sensor pigtail.

Lower the exhaust system only enough to install the catalytic converter to the resonator inlet pipe (1).

IMPORTANT: Ensure the solid portion of the catalytic converter heat shield is upward.

Slide two service clamps (2) over the catalytic converter outlet pipe (3).
Do not tighten at this time.

Slide the catalytic converter outlet pipe (3) over the resonator inlet pipe (1), until fully seated against the heated oxygen sensor boss.

Fig 2: View Of Exhaust Pipe To Catalytic Converter

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Exhaust System Inspection Notice in Cautions and Notices.

NOTE: Refer to Flex Decoupler Notice in Cautions and Notices.

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.

Fig 3: View Of Center Exhaust Hangers & Bolts

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

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.

IMPORTANT: Ensure the catalytic converter outlet pipe is fully seated against the heated oxygen sensor boss.

Position the service clamps midway on the catalytic converter 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 30 N.m (22 lb ft).
Lower the vehicle.
Check the exhaust system for leaks.