2010 GMC Terrain Owner's Manual - Page 115

Instruments and Controls 4-23 Engine Oil Pressure Light Fuel Economy Light { WARNING Do not keep driving if the oil pressure is low. The engine can become so hot that it catches fire. Someone could be burned. Check the oil as soon as possible and have the vehicle serviced. Notice: Lack of proper engine oil maintenance can damage the engine. The repairs would not be covered by the vehicle warranty. Always follow the maintenance schedule in this manual for changing engine oil. The oil pressure light should come on briefly as the engine is started. If it does not come on have the vehicle serviced by your dealer/ retailer. If the light comes on and stays on, it means that oil is not flowing through the engine properly. The vehicle could be low on oil and might have some other system problem. See your dealer/retailer. For vehicles with the fuel economy mode light, it comes on when the eco (economy) switch, located on the center console near the shifter, is pressed. For vehicles with a Driver Information Center (DIC) an ECO Mode On message displays. See Fuel System Messages on page 4‑32 for more information. Press the switch again to turn off the light and exit the fuel saver mode.