Crankcase Ventilation System Inspection/Diagnosis
WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
A plugged positive crankcase ventilation (PCV) pipe/passage way may cause:
- Rough idle
- Stalling or slow idle speed
- Oil leaks
- Sludge in the engine