MotoRad MGC903 Locking Fuel Cap for Flex-Fuel Applications with Black Cam-On (non-threaded) Caps Fuel Tank Cap Fits Chevy Silverado 1500 04–12 2500 HD 04–10 Malibu 04–12 Tahoe 04–13 Impala 06–10;

Deters vandalism and fuel theft. Manufactured with OEM quality materials and safety standards by an OE Supplier. Manufactured to pass all state and federal emissions requirements. Specifically designed pressure and vacuum relief valves to prevent evaporation of fuel. A leaking fuel cap can allow up to 30 gallons of gasoline to evaporate over the period of a year.