1995 GMC Jimmy Owner's Manual - Page 216

If No Steam Is Coming From Your Engine If you get the overheat warning but see or hear no steam, the problem may not be too serious. Sometimes the engine can get a little too hot when you: 0 0 Climb a long hill on a hot day. Stop after high speed driving. Idle for long periods in traffic. 0 Tow a trailer. See "Driving on Grades" in the Index. If you get the overheat warning with no sign steam, try this for a minute of or so: 1 . Turn off your air conditioner. 2. Turn on your heaterto full hot at the highest fan speed and open the window as necessary. 3. If you're in a traffic jam, shift to NEUTRAL (N); otherwise, shift to the or highest gear while driving AUTOMATIC OVERDRIVE DRIVE (D) for automatic transmissions. (a) If you no longer have the overheat warning, can drive. Just to be safe, you drive slower for about ten minutes. If the warning doesn't come back on, you can drive normally. If the warning continues, pull over, stop, and park your vehicle right away. engine speed is If there's still no sign of steam, push the accelerator until the about twice as fast as normal idle speed. Bring the engine speed back to normal idle speed after two or three minutes. Nowsee if the warning stops. But then, if you still have the warning,turn oJf the engine and get everyone out o the vehicle until it cools down. f You may decide not to lift the hood butto get service help right away. When you decide it's safe to lift the hood, here's what you'll see: A. Coolant recovery tank B, Radiator pressure cap C. Engine fan