1998 GMC Jimmy Owner's Manual - Page 243

Engine Overheating You will find a coolant temperature gage on your vehicle's instrument panel. See "Gages"in the Index. A CAUTION: Steam from an overheated engine can burn you badly, evenif you just open the hood. Stay away from the engine if you seeor hear steam coming off from it. Just turn it and get everyone away from the vehicle until it cools down. Waituntil there is no signof steam or coolant before you open the hood. If you keep driving when your engine is overheated, the liquids in it can catch fire. You or others could be badlyburned. Stop your engine if it overheats, and get out of the vehicle until the engine iscool. If Steam Is Coming From Your Engine NOTICE: If your engine catchesfire because you keep driving with no coolant,your vehicle can be badly damaged. The costly repairs would not be covered by your warranty. 5-12