1998 GMC Safari Owner's Manual - Page 239

r I NOTICE: In cold weather,water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolantand the proper coolant mixture. 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 engine. a hot When the coolant in the coolant recovery tank the is at ADD mark,start your vehicle. If the overheat warning continues, there's more one thing you can try. can addthe proper coolant You mixture directly to the radiator, but be sure the cooling system is cool before you it. do 5-17