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Home >> Chevrolet >> 2014 >> Express 1500 LS, AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.8L (L20), 5.3L (LMF), Or 6.0L (L96 LC8) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

Crankcase Ventilation System Inspection/Diagnosis

Symptom Correction
External oil leak Inspect for any of the following conditions:
  • Restricted or kinked PCV hose or engine vent hose
  • Damaged, incorrect or incorrectly installed PCV hose
  • Excessive crankcase pressure
Rough Idle Inspect for any of the following conditions:
  • Restricted or kinked PCV hose or engine vent hose
  • Leaking (damaged) PCV hose
  • Vacuum hoses worn or not properly installed
Stalling or slow idle speed Inspect for any of the following conditions:
  • Restricted or kinked engine vent hose
  • Leaking (damaged) PCV hose
High idle speed Inspect for a leaking (damaged) PCV hose
Sludge in the engine Inspect for restricted or kinked PCV hose or engine vent hose
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