Most fuel caps are sealed by turning them until you hear a clicking sound. An old, loose gas cap, cracked or otherwise faulty gas cap may causes your check engine light CEL turns on.
If your check engine light comes on or if you smell of gasoline or diesel vapors around or near the fuel filler cap and your car is not smoking or making a unusual noise, please take a minute to check the gas cap.
This gas cap provide a tight seal to keep your vehicle's fuel tank closed, fuel economy and reduce vapor emissions. Brand New and ready to install straight out of the box.

Compatible with Chevy Duramax Diesel Vehicles:
2017-2019 Cruze
2018-2020 Equinox
2012-2021 Silverado 2500 HD
2012-2021 Silverado 3500 HD
2012-2013 Suburban 2500
2016-2019 Suburban 3500 HD

Compatible with GMC Duramax Diesel Vehicles:
2012-2021 Sierra 2500 HD
2012-2021 Sierra 3500 HD
2018-2020 Terrain
2012-2013 Yukon XL 2500

Replaces Part #: GT366, 22910795 fuel gas cap

NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by Allmotorparts.

NOTE: To ensure accurate fitment, please confirm your vehicle information in the above compatibility section and the description or the OE#.