O.k acording to www.acdelco.com the rear rotors on a GXP are the same as the rear on a SLE like mine. Why I am bringing this up is if you go to www.powerslot.com they list slotted rear rotors for a GXP but not for my SLE. So in actual fact I can have a set of slotted rotors for the back of my car aswell. Check it out and tell me what you'all think

the GMPartsDirect catalog shows different part numbers for the SLE and GXP rear rotors, Im thinking they are not the same, theres always a possibilty they would, but it would be a shame to spend the money and not have them work.

Rear rotors probably would have too noticeable of an effect on braking performance anyway.

Rock Auto also shows different part numbers for the SLE and GXP rear rotors.

ROD

Arent the rotors drilled/slotted front and back for the GXP in stock form? If so that could be the reason for different part #*. They may actually be the same size, but one is drilled and one isnt, therefore different part #*. Have someone with a GXP here maybe take some measurements for you, see how big they are.

Maybe we should stop looking at bigger meaner rotors and consider that there is a problem that is warping the rotors when most others with the same car are not warping them. Just a thought. I know many with our cars have braking issues and always find it hard to believe that I don't, while they do.

Mine arent warping but im going th bo putting Powerslots on the front because i want to and id like to match the rears thats all so yah if someone with a GXP could get some dimensions all around for me that'd be great. And I fully agree if your rotors are warping weirdly check it out it could be more than just the rotor.