I've been thinking about doing this on my 2015 Denali. Has anybody else done the cab spoiler mod and if so do you have pictures and what are your thoughts? I'm on the fence for installing it for a few reasons one is my truck is only a two-wheel drive and it kind of looks something that a four-wheel drive should have from what I've seen from a distance. But then at the same time does it actually help with fuel mileage wind resistance and stuff like that? I do have the trifold tonneau cover installed on might as well. And I'm also looking at wanting to install a cowl hood scoop or Hood and was just looking at thoughts or suggestions. My truck is already metallic so it's that nice awkward color LOL. I do want to mention this has been one of the best trucks I've ever owned however I have noticed with treacherous rain that we have endured the past 3 weeks I finally started seeing water dripping in from the third brake light and then a mysterious water leak on the passenger side between the glove box and kit panel happened one time and I haven't seen it since. I did check my rain gutters and drain tubes for the sunroof I did check the windshield and found nothing coming in from those points. Do you other things are my folding mirrors are now not wanting to close or open together, both of my seat bottoms no longer heat up and on the remote start it seems like there is an excessive grind or rattle sound when it starts up but also is the motors running it seems like the ticking is louder than usual.. I know this is a lot of questions but I know this website is awesome for information so all help would be greatly appreciated.