1995 GMC Yukon Owner's Manual - Page 317

Adding Coolant - Gasoline Engine The coolant recovery tank is located on the passenger side at the rear corner of the engine compartment. To Check Coolant When your engine is cold. the coolant level should be at the COLD mark, or a little higher. When your engine is warm, the level should be up to the HOT mark, or a little higher. I A CAUTION: 'Jhrning the radiator pressure cap when the engine and radiator are hot can allow steam and scalding liquids to blow out and burn you badly. With the coolant recovery tank, you will almost never have to add coolant at the radiator. Never turn the radiator pressure cap - even a little - when the engine and radiator are hot. Add coolant mix at the recovery tank, but be careful not to spill it. You can be burned if you spill coolant on hot engine parts, Coolant contains ethylene glycol, and itwill burn if the engine parts arehot enough. Don't spillcoolant on a hot engine. 6-35