2007 GMC Acadia Owner's Manual - Page 410

Radiator Pressure Cap 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. See Engine Compartment Overview on page 396 for more information on location. If Steam Is Coming From Your Engine {CAUTION: Steam from an overheated engine can burn you badly, even if you just open the hood. Stay away from the engine if you see or hear steam coming from it. Turn it off and get everyone away from the vehicle until it cools down. Wait until there is no sign of steam or coolant before you open the hood. CAUTION: (Continued) Engine Overheating There is an engine coolant temperature gage on your vehicle's instrument panel. See Engine Coolant Temperature Gage on page 225. Your vehicle may also have an ENGINE OVERHEATED IDLE ENGINE and ENGINE OVERHEATED STOP ENGINE message displayed in the Driver Information Center (DIC). See DIC Warnings and Messages on page 244. 410