Yukon XL 2500 2WD V8-8.1L VIN G (2004)
Important: Twist the spark plug boot one-half turn in order to release the boot. Pull on the spark plug boot only. Do not pull on the spark plug wire
or the wire could be damaged.
7. Remove the spark plug wires from the ignition coils.
8. Loosen the valve rocker arm cover bolts.
9. Remove the valve rocker arm cover.
Important: The valve rocker arm cover gasket may be reused if not removed from the valve rocker arm cover.
10. Replace the valve rocker arm cover gasket if it is cut or damaged.
11. Clean and inspect the valve rocker arm cover. Refer to Valve Rocker Arm Cover Cleaning and Inspection.
Installation Procedure
