2009 GMC Savana Van Owner's Manual - Page 273

Radiator Pressure Cap The radiator pressure cap is located near the center of the engine compartment. See Engine Compartment Overview on page 5-14 for more information on location. Notice: If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured. You may decide not to lift the hood when this warning appears, but instead get service help right away. See Roadside Assistance Program on page 7-7. If you do decide to lift the hood, make sure the vehicle is parked on a level surface. Then check to see if the engine cooling fans are running. If the engine is overheating, both fans should be running. If they are not, do not continue to run the engine and have the vehicle serviced. See if the engine cooling fan speed increases when idle speed is doubled by pushing the accelerator pedal down. If it does not, your vehicle needs service. Turn off the engine. Notice: Engine damage from running the engine without coolant is not covered by the warranty. Notice: If the engine catches fire because of being driven with no coolant, your vehicle can be badly damaged. The costly repairs would not be covered by the vehicle warranty. Engine Overheating If your vehicle has the DURAMAX Diesel engine, see the DURAMAX Diesel manual for more information. The vehicle has an indicator to warn of engine overheating. You will find an engine coolant temperature gage on your vehicle's instrument panel. See Engine Coolant Temperature Gage on page 3-33 for more information. 5-31