LaCrosse V8-5.3L (2008)
8. Remove the positive crankcase ventilation (PCV) foul air hose from the intake manifold and valve rocker arm cover.
9. Remove the valve rocker arm cover bolts and cover.
10. Remove and discard the old the gasket (504) from the valve rocker arm cover.
11. Remove the valve rocker arm cover bolt grommets, if cut or damaged.
Installation Procedure