1997 Chevrolet Lumina Owner's Manual - Page 239
1997 Chevrolet Lumina Manual
Page 239 highlights
When you put the cap back on, turnit to the right (clockwise) until youhear a clicking sound. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap has been leftoff or improperly installed. This would allow fuel to evaporate into the atmosphere. See "Malfunction Indicator Lamp" in the Index. Checking ThingsUnder the Hood I NOTICE: If you needa new cap, be sure to get the right type. Your dealer can get onefor you. If you get the wrong type,it may not fit properly. This may cause your malfunction indicator lamp to light and your fuel tank and emissions system may be Indicator Lamp" in damaged. See "Malfunction the Index. An electric fan under the hood can start up and injure you even whenthe engineis not running. Keep hands, clothing and tools awayfrom any underhood electric fan. Things that burncan get on hot engine parts and start a fire. These include liquids like gasoline, oil, coolant,brake fluid, windshield washer and other fluids, and plastic or rubber. You or others could beburned. Be careful notto drop or spill things that will burn onto a hot engine. 6-7