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Home >> GMC >> 1985 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - V8 >> Specifications >> Service Intervals

Service Intervals

REPLACEMENT INTERVALS

Components		Intervals (Miles)
Air Filter		30,000
Oil Filter
Heavy Duty		3000
Light Duty		12,000
PCV Valve and Filter		30,000
Spark Plugs		30,000

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