URL for online GM parts??

I need to replace an abs wheel speed sensor on my 2000 Silverado. A local dealership is asking $112.55 for this. Anyone know a reliable online site where I can get it cheaper? (It's a Timken product.)

I have used www.gmpartsdirect.com They will hit up you for shipping and handling so it helps when you are buying more that one part. I have also looked at but not used www.buychevyparts.com (although they do say free shipping on orders over $50)

I am sure there are others. Also if you have a part number, I would do a google search on the number.

//2000CAYukon