want to upgrade my whole braking system and was wondering if the gp gxp rear rotors can be used on my car instead of the bonnie gxp rotors i see that the gp gxp rear rotors are vented and .29" larger

They come up[ as the same part number.But if its larger you may have to change your calipers also...And check wheel fitment

I would compare caliper and disc part numbers on both. Then if that'* the same..it'* a different bracket. GM had done that on some cars in teh past.

Bigger rotors means different calipers and mounting hardware. I doubt the stock wheels would fit. Would probably have to get at least 18" wheels.

I'm gonna go with the 18" Alcoa wheels off of the gp gxp but I want the 8" wide wheels at all 4 corners and at rock auto u compared the rear rotors and the are a different part number for the gxp Bonnie and the gxp gp