Sierra 1500 4WD V8-6.0L VIN U (2006)
9. If equipped with a 6.0L or 8.1L engine, remove the exhaust manifold pipe nuts.
10. Using the transmission jack, lower the transmission slightly.
11. If equipped with the 6.6L engine, remove the exhaust muffler nuts.
12. If equipped with a 6.6L engine, loosen the exhaust pipe clamp.
13. Slide the exhaust pipe clamp up onto the exhaust pipe adapter.
14. If equipped with a 6.0L or 8.1L engine, remove the exhaust manifold pipe.
15. Slide the exhaust manifold pipe hanger out of the exhaust pipe hanger bracket.
16. Discard the exhaust manifold pipe seal.