Have a new 07 Classic Dually with sunroof. The new sunroofs now have a screen light diffuser instead of a solid slider to close off sun on the inside, which obviously dosen't shut all of the sunlight out, for the life of me I can't figure out why GM did this....... I'm thinking that tinting the interior of the sunroof's glass might be the answer. Has anyone elce done this.....think it'll work??