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Home >> Chevrolet >> 1987 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - 6-CYL >> Specifications >> Service Intervals
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Service Intervals

REPLACEMENT INTERVALS

Components Light Duty Emissions Heavy Duty Emissions
Air Filter 30,000 24,000
Fuel Filter 30,000 12,000
Oil Filter
Normal Use 7500 7500
Heavy Use 3000 3000
PCV Valve & Filter (1) 60,000 (1) 24,000
Spark Plugs 30,000 12,000
(1) Inspection only, replace if worn.
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