1997 GMC Suburban Owner's Manual - Page 290

When you put the cap back on, turn it to the right (clockwise) until you hear a clicking sound. Make sure you fully install the cap. Checking Things Underthe Hood I-- I NOTICE: If you need a new cap, be sure toget the right type. Your dealer can get one you. If you get for the wrong type, it may not or have proper fit venting, and your fuel tank and emissions system might be damaged. CAUm-3N: If your vehicle has air conditioning, the auxiliary engine fan under the hood can start up and injure you even when the engine is not running. Keep hands, clothing and tools away from any underhood electric fan. , ! &A CAUTUN: I Things that burn can get on hot engine parts and 1 start a fire. These include liquids like gasoline or diesel fuel, oil, coolant, brake fluid, windshield washer and other fluids, and plastic or rubber. You or others could be burned. careful not to Be drop orspill things that burn ontoa hot will engine. 6-8