K 30 1 Ton Pickup 4WD V8-350 5.7L VIN M 4-bbl (1983)
Positive Crankcase Ventilation: Service and Repair
Service
GASOLINE ENGINES
Replace PCV valve and filter element every 30,000 miles. If vehicle is driven under dusty conditions, replace filter element as necessary. Inspect and
replace any hoses that show signs of damage or plugged condition.
