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Home >> Chevrolet >> 1990 >> Forward Control 6.2 J, Automatic, 400/M40 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Controls - Specifications >> Quick-Service >> Service Intervals & Specifications
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Service Intervals & Specifications

REPLACEMENT INTERVALS

Component Interval (Miles)
Oil & Filter (1) 7500
Air Filter 30,000
Coolant 30,000
Fuel Filter (2) 60,000
Spark Plugs 30,000
(1) Gasoline engines only. On diesel engines, replace every 5000 miles.
(2) Gasoline engines only. On diesel engines, replace every 30,000 miles.
BELT ADJUSTMENT

Application Tension
All Models (1)
(1) All models are equipped with serpentine belts. Belt tension is maintained by automatic tensioner and is not adjustable. Check for missing belt ribs and if belt is within tensioner's operating length or range. Replace as necessary.
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