2014 Chevrolet Impala Owner Manual - Page 297

Vehicle Care 10-23 { Caution Running the engine without coolant may cause damage or a fire. Vehicle damage would not be covered by the vehicle warranty. See Overheated Engine Protection Operating Mode on page 10-24 for information on driving to a safe place in an emergency. If No Steam Is Coming from the Engine Compartment If an engine overheat warning is displayed but no steam can be seen or heard, the problem might not be too serious. Sometimes the engine can get a little too hot when the vehicle: ... Climbs a long hill on a hot day. Stops after high-speed driving. Idles for long periods in traffic. Tows a trailer. If the coolant temperature gauge is no longer in the overheat zone, the vehicle can be driven. Continue to drive the vehicle slowly for about 10 minutes. Keep a safe vehicle distance from the vehicle in front. If the warning does not come back on, continue to drive normally and have the cooling system checked for proper fill and function. If the warning continues, pull over, stop, and park the vehicle right away. If there is no sign of steam, idle the engine for three minutes while parked. If the warning is still displayed, turn off the engine until it cools down. Also, see Overheated Engine Protection Operating Mode on page 10-24. If Steam Is Coming from the Engine Compartment See Overheated Engine Protection Operating Mode on page 10-24 for information on driving to a safe place in an emergency. . If the overheat warning displays with no sign of steam: 1. Turn the air conditioning off. 2. Turn the heater on to the highest temperature and to the highest fan speed. Open the windows as necessary. 3. When it is safe to do so, pull off the road, shift to P (Park) or N (Neutral), and let the engine idle.