GM Capless fuel system Dust/Moisture cap. Protect your vehicle's fuel system from unwanted dirt or water. This cap is designed to fit MOST GM capless fuel system vehicles. It will not fit 2016 Chevrolet Suburban/Tahoe 2016 GMC Yukon or 2016 Cadillac Escalade. It should fit all other GM Gas engine vehicles. If you have any questions about fitment feel free to message me and I will do my best to help. This cap is designed as a preventative measure to keep unwanted debris out of your fuel system, it will not help to fix a check engine light due to an EVAP leak. Newly designed to fit more makes and models and now includes a hanger to attach to your fuel door to help prevent loss.