1995 Buick Skylark Owner's Manual - Page 190

3. Then fill the coolant surge tank with the proper mix, up to FULL COLD or just above the small cylinder at the base of the opening. 4. With the coolant surge tank pressure cap off, start the engine and let it run until youcan feel the upper radiator hose getting hot. Watch out for the engine fan. this By time, the coolant level inside the coolant surge tank maybe lower. If the level is lower, add more of the proper mixto the coolant surge tank until the level reaches FULL COLD. 5-19