1998 GMC Safari Owner's Manual - Page 289

NOTICE: If you use an impropercoolant mixture, your engine could overheat and be badly damaged. The repaircost wouldn't be covered your by warranty. Too much water in the mixture can freeze and crack the engine, radiator, heater core and other parts. Checking Coolant If you have to add coolant more than times a year, four have your dealer check your cooling system. I NOTICE: If you use theproper coolant, you don't have to add extra inhibitors or additives which claim to improve thesystem. These canbe harmful. When your engine is cold, the coolant level should be at ADD, or a little higher. When your enginewarm, the is level should be up to FULL HOT, or a little higher. 6-27