1999 Buick LeSabre Owner's Manual - Page 220

First Edition for Buick LeSabre Owner's Manual - 1999 yellowblue H-45-0326-T H-45-0329-T 4. Then fill the coolant recovery tank to the FULL COLD mark. 5. Put the cap back on the coolant 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 cooling 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 proper DEX-COOLR coolant mixture through the filler neck until the level reaches the base of the filler neck. 5-18