Required Service
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
The PCV system may require service for obstructions if any of the following conditions exist:
- Rough idle.
- Stalling or low idle speed.
- Oil leaks.
- Oil in air cleaner.
- Sludge in engine.
A leaking PCV valve or hose could cause:
- Rough idle.
- Stalling.
- High idle speed.
If engine idles rough, check for clogged PCV valve, or for plugged or broken PCV hoses BEFORE adjusting idle. Check PCV valve application to ensure valve is fitted. Replace PCV valve if required.