Sorry if this is a repeat issue but if searched all over the place for a concrete answer with nothing really firm.
Here's my situation - I recently changed all four wheel bearings because some were making noises and were bad (2007 base model). I just figured at 122,000 I might as well change all of them. Admittedly I used cheaper bearings off of eBay. All was great for a few weeks then I started getting low speed ABS activation. Sometimes the ABS and Traction Control lights came on...sometimes they didn't. Seemed to happen more often later in the day when it is hotter outside.
Took it in for a different issue and asked the mechanic to scan for ABS codes. He said there were three historical codes: two for the right front speed sensor and one for the module itself. He said that based on his experience it was more than likely the module and wanted more $$$$ for diagnosis.
I figured that since the bearings I used were cheap that the right front was the problem. Went to AutoZone and got a new one, and changed it out. Same problem. That started me thinking that the module was indeed the problem.
Went to eBay to one of the vendors that repair ABS modules and explained my situation. He just emailed back and said it sounded more like a speed sensor in the bearing. Since the bearing is new and he's saying it's not the module I'm thinking it might be the wiring...I know that GM sells wiring harness sections for this problem.
Again: symptoms are unintended low speed activation of the ABS. Happens when coming to a stop at very slow speeds. Once it starts happening it will do it a few times then the ABS and Traction Control lights will come on.
What do you all think? Bearing, module, or wiring?
Thanks for all of your help-
Originally Posted by Scottydoggs
04 Impala SS Indy: 
