S10/T10 Blazer 4WD V6-4.3L VIN W (1997)
Positive Crankcase Ventilation: Service and Repair
An engine can be damaged if operated without a crankcase ventilation valve. Therefore, it is important to perform the Functional Check or the
maintenance schedule of the vehicle. Refer to Crankcase Ventilation System Diagnosis / Crankcase Ventilation System Functional Test.
Replace the crankcase ventilation components as the diagnosis requires. The recommended replacement parts are listed in the Specifications section of
the owners manual of the vehicle.
Periodically, inspect the hoses and clamps. Replace any showing signs of deterioration.
