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CRANKCASE VENTILATION SYSTEM INSPECTION/DIAGNOSIS Crankcase Ventilation System Inspection/Diagnosis DRIVE BELT CHIRPING DIAGNOSIS Diagnostic Aids The chirping noise may be intermittent due to moisture on the drive belt(s) or the accessory drive pulley(s). In A loose or improper installation of a body or suspension component, or other item(s) on the vehicle may also Test Description The number(s) below refer to the step(s) in the diagnostic table. Symptom Correction External oil leak Inspect for any of the following conditions: z Restricted positive crankcase ventilation (PCV) valve z Restricted or kinked PCV hose or engine vent hose z Damaged, incorrect, or incorrectly installed PCV valve or hose z Excessive crankcase pressure Rough Idle Inspect for any of the following conditions: z Restricted PCV valve z Restricted or kinked PCV hose or engine vent hose z Leaking (damaged) PCV valve or hose z Vacuum hoses worn or not properly installed Stalling or slow idle speed Inspect for any of the following conditions: z Restricted PCV valve z Restricted or kinked PCV hose or engine vent hose z Leaking (damaged) PCV valve or hose High idle speed Inspect for a leaking (damaged) PCV valve or hose Sludge in the engine Inspect for any of the following conditions: z Restricted PCV valve z Restricted or kinked PCV hose or engine vent hose
2004 Hummer H2 2004 ENGINE Engine Mechanical - 4.8L, 5.3L, and 6.0L - Hummer H2
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