1995 Cadillac Fleetwood Owner's Manual - Page 204

By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper mix to the coolant surge tank until the level reaches the FULL COLD mark. 5. Then replace the pressure cap. Be sure the pressure cap istight. 4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feelthe upper radiator hose getting hot. Watch out for the engine fans. 5-19