- If equipped with a 6.0L engine, with RPO Y91, install a new exhaust manifold pipe
seal to the exhaust manifold pipe.
- Install the exhaust manifold pipe.
- Apply lubricant to the exhaust pipe hanger bracket, in order to aid in installation.
- Slide the exhaust manifold pipe hanger into the exhaust pipe hanger bracket.
- Install a new exhaust manifold pipe seal to the exhaust manifold pipe.
- Install the exhaust manifold pipe.
- Apply lubricant to the exhaust pipe hanger bracket, in order to aid in installation.
- Slide the exhaust manifold pipe hanger into the exhaust pipe hanger bracket.
Notice: Refer to Fastener Notice in the Preface section.
- Install the exhaust manifold pipe nuts.
Tighten
Tighten the nuts to 50 N·m (39 lb ft).
- Using the transmission jack, raise the transmission.
- If the exhaust manifold pipe was replaced perform the following:
11.1. | Apply anti-seize compound GM P/N 12377953 or equivalent to the threads of the old oxygen sensor. |
11.2. | Install the old oxygen sensor. |
Tighten
Tighten the sensor to 42 N·m (31 lb ft).
- If the exhaust manifold pipe was not replaced perform the following:
12.1. | Connect the oxygen sensor electrical connector. |
12.2. | Connect the CPA retainer. |
12.3. | Install the clip around the engine harness and the oxygen sensor pigtail. |
- Install the exhaust pipe/catalytic converter to the vehicle.
- Install the exhaust system hangers.
- Depending on which side is being replaced, perform one of the following steps:
• | Install the exhaust muffler nuts. |
Tighten
Tighten the nuts to 40 N·m (30 lb ft).
• | Install a NEW exhaust pipe clamp. |
Tighten
Tighten the clamp to 44 N·m (33 lb ft).
- Install the transmission support crossmember.
- Install the transmission support crossmember bolts.
Tighten
Tighten the bolts to 95 N·m (70 lb ft).
- Lower the transmission onto the transmission support.
- Install the transmission mount to transmission support nuts.
Tighten
Tighten the bolts to 40 N·m (30 lb ft).
- Remove the support from the transmission.
- Lower the vehicle.