Ok, so driving to work today and the ABS and TC dash lights came on at same time. I have a 2007 H2. More info, just dropped the gas tank and replaced fuel pump to correct a check engine light(Evap system leak). This is fixed. Thinking I may have loosened a wiring connector somewhere on the back axle.


What you guys think? Where should I look when I get home today?

 

You need a scan to tell you what wheel sensor is responsible for the code. That will help narrow it down.

 

Update, Scan said right front sensor. So, purchased a new one and installed (old one had been worn near in two by wheel as the cable was not in its retainer). Started it up and no more lights. Success right? Nope, as soon as I drive forward lights come back on. More testing I guess.

 

Visually inspect the wiring that comes off the plug. Very common for the wire to break due to the constant up and down movement of the control arm. You can buy replacement pigtails at the auto parts stores.