Please, need help asap. I am having numerous issues with my abs system. 2004 SS 3.8 SC. Constant problems with the abs system. Have replaced both front hubs and right side wiring from abs module to wheel. Also has a used abs module now installed. Still getting the service traction system abs light trac off and brake light illuminated. Cleaned the abs ground connection and still having the same issues....please any advice is needed and appreciated. HELP me please.

 

Forget to add latest code was U1040 and p0856 (lost communication with abs module and trac signal)

 

I had this issue with my 03' SS, replaced both front hubs, no go finally stopped when I replaced both c/v axles ??

 

I have no clue, the codes seem to be pointing to a communication issue. Not sure where to go next that is why I need all the help and advice I can get

 

Keith, unless the new (used) ABS module is bad, I would focus on the wiring, connectors, relays (2), and ground (especially the one under the air filter box) for the ABS (EBCM) module. A "U" code indicates a fault in the "Class 2 Serial Data Link". A wheel speed sensor would throw a "C" code. A Tech 2 scanner would be very helpful with diagnostics for this because it has a menu item specifically dedicated to testing the brake system.