Review on 🔒 ACDelco GT337 Fuel Tank Filler Cap: Genuine GM Original Equipment by Mike Groover

This fixes the check engine light caused by the EVAP system in my 2013 Equinox. Cars no longer run on petrol. They run on exhaust fumes. This is why the correct functioning of the EVAP system is so important. Be sure to read the headline. It says one click and it's important to follow. If you turn it too far, it could leak and the EVAP system will complain, resulting in reduced power and fuel efficiency. Otherwise this is a great product!