1999 GMC Yukon Owner's Manual - Page 254

yellowblue CAUTION: (Continued) Don't run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle. NOTICE: The coolant level should be at or above the COLD mark. If it isn't, you may have a leak in the radiator hoses, heater hoses, radiator, water pump or somewhere else in the cooling system. Engine damage from running your engine without coolant isn't covered by your warranty. NOTICE: When adding coolant, it is important that you use only DEX-COOLR (silicate-free) coolant. NOTICE: (Continued) CAUTION: Heater and radiator hoses, and other engine parts, can be very hot. Don't touch them. If you do, you can be burned. CAUTION: (Continued) 5-12