1994 Buick Park Avenue Owner's Manual - Page 215

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 4. Then fill the coolantrecovery tank to "FULL COLD." more of the proper mix through the filler neck until the level reaches the base of the filler neck. 5. Put the cap back on the coolant recovery tank, but leave the radiator pressure cap off.