1993 Buick Roadmaster Owner's Manual - Page 260

..., I Adding Coolant . ': . : , . oronP.1:mix at the coolant recovery tar&. The coolant recovery tank located at the of the .is left engine compartment, directly. behind . the'battery. ro Add Coolant: If you need more coolant, add the. .To Ch.eck.Coolant: When your engine is cold, the co;olant,levelsl~oultj .at"FULL COLD,'' or a little . be high_-..'When your engine is 'warm, the.level should'ke: .. '...,. up to - iLL,HOT,"or'a .little higherd...," ...',L;. ' ' . . . .