Catalytic Converter: Service and Repair
CATALYTIC CONVERTER REPLACEMENTREMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the engine protection shield bolts and shield.
3. Disconnect the connector position assurance (CPA) retainers.
4. Disconnect the oxygen sensor electrical connectors (1, 2).
5. Remove the left exhaust manifold pipe nuts.
6. Remove the catalytic converter.
7. Slide the catalytic converter hanger out of the exhaust pipe hanger bracket.
8. Remove the oxygen sensors if the catalytic converter is to be replaced.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. It the catalytic converter was replaced, perform the following:
1.1. Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensors.
1.2. Install the oxygen sensors.
Tighten
Tighten the oxygen sensors to 42 N.m (31 lb ft).
2. Install a NEW exhaust seal to the exhaust manifold.
3. Install the catalytic converter.
Slide the catalytic converter hanger into the exhaust pipe hanger bracket.
4. Install the left exhaust manifold pipe nuts.
Tighten
Tighten the exhaust manifold pipe nuts to 50 N.m (39 lb ft).
5. Connect the oxygen sensor electrical connectors (1 2).
6. Connect the CPA retainers.
7. Install the muffler.
8. Install the engine protection shield and bolts.
9. Lower the vehicle.