Sierra 3500 4WD V8-6.6L DSL Turbo VIN 2 (2004)
17. If equipped with a 6.0L engine, with RPO Y91, remove the exhaust manifold pipe.
18. Slide the exhaust manifold pipe hanger out of the exhaust pipe hanger bracket.
19. Discard the exhaust manifold pipe seal.
20. If equipped with a 6.6L engine, remove the exhaust manifold pipe.
21. Slide the exhaust manifold pipe hanger out of the exhaust pipe hanger bracket.
Installation Procedure
1. If equipped with a 6.6L engine, install the exhaust manifold pipe.
2. Apply water based lubricant to the exhaust pipe hanger bracket, in order to aid in installation.
3. Slide the exhaust manifold pipe hanger into the exhaust pipe hanger bracket.
4. If equipped with a 6.0L engine, with RPO Y91, install a new exhaust manifold pipe seal to the exhaust manifold pipe.
5. Install the exhaust manifold pipe.
