The top of your stove is probably ceramic glass. I would think that the rear glass would be heat resistant. That type of glass will radiate a lot of heat so I wonder would tint reduce its ability to do that ? I guess you would have to ask the GM engineers. I always notice when I’m putting the condom back on the car after a drive that there’s considerable heat coming from all of the openings around that beauty engine. And if in fact the bottom half inch of glass can’t be tinted, which on the face of it seems odd , the spoiler would cover it anyway. I think I’m in . That will be my second addition to the car but will probably be more noticeable than the new valve stem caps…..