Are Grand Prix GXP brake calipers the same as Bonneville GXP brake calipers and rotor
 

I was wondering if the Grand Prix GXP brake calipers and rotors were the same size as my Bonneville GXP calipers and rotors.Also if they are bigger what size are the rotors and can they be swapped onto my Bonneville GXP.Thanks,any help would be much appreciated.Thanks,Craig

From what I can tell no. Both the rotor and the caliper have different part numbers

Does the GP GXP come with 18" wheels? I would think the brakes are different. The GXP has an FE5 front suspension that was specific only to it.

Both cars have 18 inch wheels

The fronts are the same. Rears are not. Both have 12.7" brakes up front.

the Calpers ARE different. the Rotor size is the same 12.7 in the front as olds has said

The fronts are diffrent as well or just the rears?

The front calipers on the Grand Prix might be the same size but have GXP painted on the calipers whereas the Bonneville does not have GXP on the calipers which would give it a different part no. ,but they look the same size

What is different on the rears?Does anyone know if caliper is different size or rotor?

the rear calpier is different, in the way it mounts on to the Lower controll arm. It also has a different bracket because of the LCA

the Fronts will not bolt up there will have to be fabrication