Hi my name is Clay my 04 gxp bonneville vibrates from the front when I aply the brakes.
The problem started about 9 mounths after I replaced the factory brake pads. I put ceramic pads on the front and it stoped the squilling and brake dust but now it seems if I need to turn my front rotors. What I wnat to now is if any body else has run into this problem.

i believe because the ceramics are a harder compound they are a quite a bit harder on the stock rotors...because they consist of the harder compound they warped em...

I aggree with Pat fully, if they are indeed warped you might consider replacing them with a set of SLOTED rotors to help vent then and keep them cooler to help prevent furture warping issues

Clay, i agree as well. Almost 95 percent of the time the problem you descibe is warped rotors. Considering you have put a second set of pads on already, I dont know that turning the rotors is the way to go. Given the heat generated by ceramics you dont know if turning them will give you a true surface and the amount they will have to take off to accoplish this wont leave you much life left anyway. Unless you have extra bucks to spend on slotted rotors I wouldnt go that route. Stock rotors or OEM replacements with ceramic pads will give you all the braking you need. Your not running at 200MPH in a Nextel race to the finish. And I dont think they will stand up any better than OEM'* as far as warping again. Slots for stock vehichles is for show and for a daily driver just "fluff". .From what I've read slots create more edges for grip on the pads and that creates more heat. So any cooling advantages are offset by this. If you ever see the shots of Nascar vehicles they show under the car, you will see they are for more grip, not cooling. I have seen vids of slots getting cherry red under these conditions. So where'* the cooling? And thats with 200MPH wind hitting them. Race cars change slotted rotors every race.

actually Slotted are good for the daily driver....its the drilled that is a NO NO

Not to turn this into another great brake debate....LOL I didnt say that slots were bad, and I'm sure they would deliver greater braking power. My thought was cost and availability, and I doubt any increased protection against warping or having more life than a much less costly OEM replacement.

hehe gotcha i didnt understand your orignal intention of the post.....butttttt i gotha now

My understanding was that GXP'* came from the factory with ceramic pads. I'd be looking for a root cause before buying new rotors.

I heard that somewhere in the past here as well Will...but I assure you they are not ceramic, No way no how. Plain ole grind em up and leave my $2000 worth of chromes semi metallic black..I examined them closely when I painted my rotors , had the little brass fibers in them and all.

I wish GM were so nice as to give us factory ceramic pads. With the brake fade my GXP had they were not ceramic.