Are the louvers nearly closed or is that an optical illusion? I also am mystified how anyone can buy a 2015 Tahoe and immediately go beater car cheap on oil and filter changea. It may be out of warranty now who knows. Amazing to me, I could never justify that kind of expensive car, but I can justify the oil filter for the price of a few gallons of gas, a cup or two of Starbucks, one subway sandwich, etc etc.