I had the inside of my 2014 doors flaking at 2 years / 14,000 miles. Dealer wasn't sure what to do. I decided that I did not like the 2.4 as the oil level acted like it was making oil according to the dip stick (gas), and the darn doors, I traded it for my 2016 with a V6. Every time I wash it, I wipe down the inside of the doors in an attempt to prevent the same issue. Moisture does get trapped above the seal and Wisconsin's treated roads in the winter sure are not helping either. I have been waiting to hear from the 2018 & newer owners if there has been any improvements with this issue.
2016 Equinox LT AWD - 3.6L LFX V-6 - Patriot Blue / DOB: 1/26/2016<br />2017 Colorado LT 4X4 - 3.6L LGZ V-6 - Silver Ice Metallic / DOB: 01/05/2017