1996 Buick LeSabre Owner's Manual - Page 250

COOLANT LOW Turning the radiator pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn badly. you With the coolant recovery tank, will almost you never have to add coolant the radiator. at Never turn the radiator pressure cap even a little when the engine and radiator are hot. -- -- Adding Coolant If you need more coolant, add the proper mix at the coolant recovery tank. Add coolant mix at the recovery tank, but be careful not to spill it. A CAUTION: You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol, and it will burn if the engine parts are hot enough. Don't spill coolant on hot engine. a 6-22