Installation Procedure

Install the exhaust system.
NOTE: A second technician is required.
Install the NEW exhaust front pipe gasket (4).

Fig 1: Heated Oxygen Sensor
Courtesy of GENERAL MOTORS COMPANY
Install the 3 NEW catalytic converter nuts (3) to the exhaust front pipe (2) and tighten to 22 N.m (16 lb ft).
CAUTION: Refer to Fastener Caution .

CAUTION: Refer to Torque-to-Yield Fastener Caution .
Install the heated oxygen sensor (1) and tighten to 42 N.m (31 lb ft).
Install the 2 exhaust pipe front hanger bracket insulators (1).

Fig 2: Exhaust Pipe Front Hanger Bracket, Insulators, Nuts And Bolts
Courtesy of GENERAL MOTORS COMPANY
Install the exhaust pipe front hanger bracket (2).
Install the 2 exhaust pipe front hanger bracket insulator nuts (3) and tighten to 17 N.m (13 lb ft).
Install the 4 exhaust pipe front hanger bracket bolts (4, 5) and tighten to 22 N.m (16 lb ft).
Install the 2 exhaust pipe front hanger bolts (5) - M10 and tighten to 60 N.m (44 lb ft).
Install the exhaust rear muffler. Refer to Exhaust Rear Muffler Replacement .