Catalytic Converter Replacement Right Hand

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the catalytic converter guard. Refer to Catalytic Converter Guard Replacement in Frame and Underbody.



3. Disconnect the connector position assurance (CPA) retainers.
4. Disconnect the oxygen sensor electrical connectors (1, 2).
5. Remove the catalytic converter to muffler flange nuts.



6. Remove the left exhaust manifold pipe nuts.



7. Remove the catalytic converter.



8. Remove the oxygen sensors if the catalytic converter is to be replaced.

Notice: Refer to Fastener Notice in the Preface section.




1. If 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.



4. Install the left exhaust manifold pipe nuts.

Tighten
Tighten the exhaust manifold pipe nuts to 50 N·m (39 lb ft).

5. Install the catalytic converter to muffler flange nuts.

Tighten
Tighten the nuts to 48 N·m (35 lb ft).




6. Connect the oxygen sensor electrical connectors (1, 2).
7. Connect the CPA retainers.



8. Install the catalytic converter guard. Refer to Catalytic Converter Guard Replacement in Frame and Underbody.
9. Lower the vehicle.

Catalytic Converter Replacement Left Hand

1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
2. Remove the catalytic converter guard. Refer to Catalytic Converter Guard Replacement in Frame and Underbody.



3. Disconnect the connector position assurance (CPA) retainers.
4. Disconnect the oxygen sensor electrical connectors.
5. If replacing the exhaust manifold pipe, remove the oxygen sensors.



6. Remove the exhaust manifold pipe nuts.
7. Loosen the exhaust pipe clamp nut.



8. Remove the exhaust manifold pipe.
9. Discard the exhaust manifold pipe seal.

1. Install a new exhaust manifold pipe seal to the exhaust manifold pipe.
2. Install the exhaust manifold pipe.
3. Replace exhaust pipe clamp if necessary.

Notice: Refer to Fastener Notice in the Preface section.




4. Install the exhaust manifold pipe nuts.

Tighten
Tighten the nuts to 50 N·m (39 lb ft).

5. Tighten the pipe clamp nut.

Tighten
Tighten the pipe clamp nut to 40 N·m (29 lb ft).




6. If the exhaust manifold pipe was replaced perform the following:

6.1.	Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensors.

6.2.	Install the old oxygen sensors.

Tighten
Tighten the oxygen sensors to 42 N·m (31 lb ft).

7. If the exhaust manifold pipe was not replaced perform the following:

7.1.	Connect the oxygen sensor electrical connectors.

7.2.	Connect the CPA retainers.

8. Install the catalytic converter guard. Refer to Catalytic Converter Guard Replacement in Frame and Underbody.
9. Lower the vehicle.