Does window tinting count??
I did nothing to the Solstice GXP, and when it ended up being bought back we were glad that we didn't. We would have lost every penny that we put into any mods that weren't done by GM and there was a possibility that it would have caused problems with the buy back. So I am a little leary of doing anything but beautification to this car just yet.
Down the road we are going to have the programing done that boosts the horsepower to 401. It's something that the dealership can do and won't void anything. I don't remember what it was called. But it sounded good to me!
Marrilee