I just recently purchased a 2017 Trax, I decided to get the cargo tray liner that fits the trax directly from gm(chevy). I had no idea that it went all the way up to behind the seat, which has to be fastened down. I thought it was just the size of the trunk. The other thing I'm concerned about is, the flap that is hooked up, I like to keep that on for security purposes for the most part. Although it looks like in the picture on the installation sheet it can't be put back on. Does anyone else have this cargo liner in their Trax? I'm almost wondering if I should've gotten a weather tech mat instead. Thanks in advance!!!