Installation Procedure

Fig 1: View of Rear Exhaust Hanger Bracket from Rear Exhaust Hanger

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the nut securing the rear exhaust hanger to the rear exhaust hanger bracket.
Tighten: Tighten the rear exhaust hanger nut to 30 N.m (22 lb ft).

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.

With the aid of an assistant, raise the exhaust system into position, aligning the catalytic converter with the exhaust manifold pipe.
Finger tighten the four nuts to the catalytic converter studs.

Fig 3: View of Rear Exhaust Hanger Bracket & Exhaust System

Courtesy of GENERAL MOTORS CORP.

Install the bolt securing the rear exhaust hanger bracket to the rear compartment rail.
Tighten: Tighten the rear exhaust hanger bolt to 50 N.m (37 lb ft).

Fig 4: View Of Center Exhaust Hangers & Bolts

Courtesy of GENERAL MOTORS CORP.

Install the two 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 four catalytic converter nuts previously installed in step 5.
Tighten: Tighten the catalytic converter nuts to 25 N.m (18 lb ft).
Install the heated oxygen sensor. Refer to Heated Oxygen Sensor Replacement - Position 2 in Engine Controls - 3.8 L.
Install the oxygen sensor wiring harness heat shield. Refer to Oxygen Sensor Wiring Harness Heat Shield Replacement .
Lower the vehicle.