99 GPGT When I hit my breaks on snow or ice my ABS doesnt seem to be working right. For one thing my brakes are locking up and my I get a bad growling from my brake peddle as is vibrates like hell. I have no ABS lights or any other lights on on the dash. On dry and wet roads the work fine. This just started about a week ago. I have had ABS act up before but never like this and I have never had them lock up unless I pulled the fuse. IM about to pull the ABS fuse on this one but thats not fixing the problem. Any input would be greatly appreciated. Thanks