I want to put two decals on my back window. One that says Chevrolet or Chevy along the top of the window. The other decal is a white outline of the Chevrolet logo. My question is, is having something in your back window illegal in any state? I can see out my window very well. The Chevrolet logo isn't filled in and the word Chevrolet is at the very top. I also have a 2008 Cobalt if that makes any different. Also, I want to tint my window is there a website I can go to, to see the legal tint in each state? I am in the Army and have to travel a lot to different state so I need to know the minimum because I never know where I'll be, however, my car will be registered in PA.