1995 Cadillac Eldorado Owner's Manual - Page 247

P I' . A 5 -20 4. With the coolant surge tank pressure cap off, start theengine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine fans. By this time, the coolantlevel inside the coolant surge tankmay be lower. If the level is lower, add moreof the propermix to the coolant surge tank until the ievel reaches the baseof the filler neck.