1995 Cadillac Seville Owner's Manual - Page 296

To Check Coolant When your engine is cold, the coolant level should be at the proper level, which istwo and ahalf inches (60 mm) below the base of the fill neck. Use aflashlight as necessary to see into thetank. To Add Coolant If you need more coolant, add the proper at the coolantsurge tank, mix but only when the engine is cool. When replacing the pressurecap, make sure it is tight. - 6-25