When my 16 year old son totaled my wife's Supercharged Bonne, we replaced it with a GTP Comp-G. It's been satisfactory (once she got over loosing the Bonne and it's luxury) until recently. After driving a few mile it smells like I've had it on a road course and gotten the brakes hotter than regions far south where I'm told bad people go. At first I thought she was hot-dogging it more than expected, then I drove it around running some errands, stop-n-go, not pushing it at all, and noticed the same thing. I also noticed (and she confirmed) a periodic sort of "grinding" as though the rotors had gotten a little rusty though they have not. This often happens while turning without brakes applied.

It also seems to eliminate the problem when the "traction control" is turned off. I'm guessing this system works with the antilock brakes to control wheel spin so that sounds suspicious.

It's at the dealership now getting a look over but I wanted to find out if anyone has any knowledge on this. I don't trust most service techs and I don't know anyone at this dealer. IMO, dealers treat them like garbage and tend to generate bad attitudes and "rushing", so I like to have a good idea what's going on when something like this happens.

Any other "service bulletins" I should "remind" them of while they are at it?