PontiacBonnevilleClub.com

Not that I'm aware of.

Glad i looked at this section as I think I have my questions answered about my Bonnie's brakes... I was a little confused as to why my front calipers were painted red and the rears are not, i thought the previous owner painted the fronts and never got around to the rears... with less than 60k Id hope the rear calipers have not been replaced... so on the GXP just the front were painted from the factory? Strange... as for turning rotors, I dont ever do it... on my cars Ive alwaystried to replace pads before they get grooved but if its nominal I never worried as a little more surface area = more stopping power, though nominal Im sure... turning a rotor just makes it thinner and the sooner you will have to replace it plus makes it easier to warp which gives you the vibrations that are so annoying... drilled rotors are fine for normal driving though the occasional water puddle might induce cracking even in cast rotors if driven hard... I am a believer in slotted only, as this works great for venting the gasses and heat that produce fade and warpage... recently I was looking into "CRYO-treated" rotors for my Trans Am and was wondering if anyone here has any experience with those... I understand the benefits of deep freezing metals for "alignment of molecules" but was wondering if the actual benefits are worth the extra cost when it comes to rotors... seems like it would to me but none of my car buddies have ever experimented with them... was also wondering if anyone knows of an upgrade in rotor size for the 2005 GXP that would be a bolt on from another GM product? maybe from a Caddy? Im sure I could go the Wilwood/Brembo route, but then I couldnt just go down to O'Reily's and pick them up when needed... plus the extra cost of course...

The rear calipers should've been painted.



The GXP already has 13" rotors, which is the same setup as what the Caddy DTS has. Unless you're doing major road-course action you're not going to get any advantage from a larger rotor.

I do not recommend drilled rotors for street driving, period. Too many what-ifs and risks. It's just not worth it.

Drilled rotors look ricy and cheap. Slotted only is the way to go.