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Home >> GMC >> 1985 >> Forward Control 6.2 J, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Mechanical >> Engine Cooling Fan >> Cooling System Maintenance >> Refilling
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Cooling System Maintenance: Refilling

Engine should be running while refilling cooling system to prevent air from being trapped in engine block. After system is full, continue running engine until thermostat is open. Recheck coolant level. Do not overfill system. Refer COOLANT SPECIFICATIONS.