1993 Chevrolet Lumina Owner's Manual - Page 177

CAUTION NOTlCE 1 The coolant level should be or above at the COLD mark. If it isn't, you may have a leak in the radiator hoses, heater hoses, radiator, water pump or somewhere elsein the cooling system. I l I If you haven't found a problem yet, but the coolant level isn'tat or above COLD, add a 50/50 mixture of clean water (preferably distilled) and a proper antifreeze at thecoolant recoverytank. (See the Index under Engine Coolant for more information about the proper coolant mix.) Heater and radiator hoses, L L and other engine parts, can be very hot. Don't touch them. If you do, you can be burned. Don't run theengine if there is a leak. If you run theengine, it could lose all coolant.That could cause an engine fire,and you could be burned. Get any leak fixed before you drivethe vehicle. Adding only plain water to your cooling system be can Amgerous. Plain water, or some .ler liquid like alcohol, can boil before the proper coolantmix will. Your vehicle's coolant warning system is set for proper coolant the mix. With plain water or wrong the mix, your engine could get too hot but you wouldn't getthe overheat warning. Your engine could catch fire and youor others could be burned. Use a 50/50 mix of clean A ~ I NOTICE 175 .