Sierra Denali AWD V8-6.0L VIN N (2004)
Exhaust Pipe: Service and Repair
Exhaust Manifold Pipe Replacement (6.0L, 6.6L, and 8.1L Engines)
Removal Procedure
1. Raise and suitably support the vehicle.
2. Support the transmission with a suitable transmission jack.
3. Remove the transmission mount to transmission support nuts.
4. Raise the transmission off of the transmission support.
5. Remove the transmission support crossmember bolts.
6. Remove the transmission support crossmember.
7. If equipped with a 6.0L or 8.1L engine, remove the exhaust muffler.
8. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Remove the clip around the engine harness and the oxygen sensor pigtail.
2. Disconnect the connector position assurance (CPA) retainer.
3. Disconnect the oxygen sensor electrical connector.
4. Remove the oxygen sensor.
