Sierra Classic 2500 4WD V8-6.0L (2007)
6. If equipped with a 4.3L, 4.8L, or 5.3L engine, remove the left exhaust manifold pipe nuts.
7. If equipped with a 4.3L, 4.8L, or 5.3L engine, remove the right exhaust manifold pipe nuts.
8. If equipped with a 6.0L or 8.1L engine, remove the right exhaust manifold pipe nuts.
9. If equipped with a 6.0L or 8.1L engine, perform the following:
1. Remove the left exhaust manifold pipe nuts.
2. Remove the exhaust hanger mounting bracket bolts.
10. Lower the catalytic converter or exhaust manifold pipe using the adjustable jackstands.
11. Remove the exhaust manifold pipe seal(s).
Installation Procedure
