Yukon/Denali XL 1500 4WD V8-6.0L VIN U (2004)
PCV Valve Hose: Service and Repair
Crankcase Ventilation Hoses/Pipes Replacement
Removal Procedure
1. Remove the engine sight shield. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L (RPO LQ4)) or Engine Sight Shield
Replacement (6.0L (RPO LQ9)).
2. Remove the Positive Crankcase Ventilation (PCV) hose from the intake manifold and valve rocker arm cover.
3. Remove the vent hose from the throttle body and the valve rocker arm cover.
4. Replace the hose as necessary.
Installation Procedure