my truck seems to anti lock for no reason on slow stops and turns. anyone ever have a problem with this before? just put new pads and rotors and still have the same problem. any help would be appriciated. thanks

Yeah,

I have a 2003 Sierra sle and had the same problem. If you are mechanical at all you can fix it yourself without any special tools other than some metric sockets and a #55 torx.

The problem is with a wheel speed sensor (wss) on one of the front tires. You need to take your tire, brake caliper and disk off. Pull the wss off and then plug the hole with some toilet paper. Sand paper the mounting surface untill all rust/corrision is off and clean and grease the wss and replace it. Do both sides and it should be fixed. This is a huge problem with GMC trucks. There is rust build-up on the wss mounting surface and it pushes it away from the gears, giving you a false reading indicating wheel slippage.

I did both of mine but the 2nd one was broken. I had to sxtract the broken piece from the hole and replace the wws with a new one. The part was $124 from a GM dealer. Napa and Autozone both showed I needed to replace the entire hub for $500, but a quick call to the dealer and he had one wss in stock.

If you need to replace it you need your VIN because there are so many different models of wss's.

Get yourself a chilton or haynes manual and you can do this. Otherwise, there will be a couple hours of labor and the part at your dealer-

I'll give you my number if you want me to explain it better-

michael