1993 GMC Jimmy Owner's Manual - Page 243

Engine Overheating You will find a coolanttemperaturegageonyourvehicleinstrumentpanel. If Steam /sComing From Your Engine: K2321 A Steam from anoverheatedengine can burn you badly, even if you just open the hcxxf. Stay away from the engine if you see or hear steam corning from it. Just turn it off and geteveryoneaway from the vehicle uniil it coots down. Wait untii them is no sign of steam or coolant before opening the hoocl. If you keep driving when your engine is ove&eated,the liquids in it cancatch fire. You or.others could be badly burned. Stop your engine i it overheats, and get out ofthevehicle until the engine is f I 5-9