c4racer

no - OBD-II scanner does not read anything. Is there another scanner needed to read the body PCM codes? Other than a tech-2, or is that what it takes? Don't have one of those. Dealer would probably charge me $100 just to read the codes and troubleshoot the problem - if I can rebuild the module for $150 that is worth it. I already replaced the front hubs. I guess it could also still be the rear axle speed sensor tho, might swap that out first.

I just climbed under there and seems I do have the rebuildable one in my 2500 01 burb too. I guess I will rip that thing off and send it out for a rebuild.

I cleaned all 3, one at a time, and the culprit seems to have been the one behind the bumper on the driver's side. The lights have been off all day, hope it did the trick. Figured it was the ground when I had to give a guy at work a jump start and couldn't draw enough power through the frame, had to use the negative on the battery. And then the light went out too. This board rocks. indeed - quite frustrating. I thought I had it licked. First I replaced the right side hub. No change - lights came right back on. Next I replaced the left side hub and the light stayed off. Or so I thought. On a longer drive it eventually came on again. So I cleaned the body computer ground under the drivers door. Again - I thought that fixed it because I did two drives without any lights. Then this AM on the 4th drive it came on again. Damn. Of course - I have the burb for sale now, and I thought I had this fixed... Damn. What a PITA. So I guess next is the ground behind the front bumper? Where is that exactly? I had trouble finding it. I have a 2500 series 2001 Suburban.