Sierra 2500 Denali 2WD V8-6.0L (2011)
17. Remove and discard the old gasket (1).
18. Remove the oil fill cap (424) from the oil fill tube (423), if necessary.
19. Remove and discard the oil fill tube, if necessary.
Installation Procedure
Note:
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All gasket surfaces should be free of oil or other foreign material during assembly.
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DO NOT reuse the valve rocker arm cover gasket.
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If the oil fill tube has been removed from the rocker arm cover, install a NEW fill tube during assembly.
1. Lubricate the O-ring seal (422) of the NEW oil fill tube with clean engine oil.
2. Insert the NEW oil fill tube (423) into the rocker arm cover.
Rotate the tube clockwise until locked in the proper position.
3. Install the oil fill cap (424) into the tube.
