Silverado SS AWD V8-6.0L VIN N (2003)
9. Remove the Positive Crankcase Ventilation (PCV) hose.
10. Loosen the valve rocker arm cover bolts.
11. Remove the valve rocker arm cover.
12. Remove and discard the old gasket (1).
13. If required, clean and inspect the rocker arm cover.
Installation Procedure