1993 Cadillac DeVille Owner's Manual - Page 258

7 5. Put the cap back on thecoolant recovery tank, but leave the radiator pressure cap off. 6. Start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine fans. 7. By this time the coolant level inside the radiator filler neck may be lower. If the level is lower, add more of the propermix through the filler neck until the level reaches the base of the filler neck. 245