Traction control light stays on. please read below.

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I have a Saturn Relay 2007 and the abs traction light keeps coming on since I bought it. I have had the sensors replaced multiple times since I bought this vehicle. The lights still keep coming on. When they do you can feel the traction in the tires when you brake. It is like the wheels are still turning with your foot on the brakes. My mechanic has taken the van to a GM dealer ship also and they can not figure it out! Go figure! GM has not been helpful at ALL!!!! I want to know what is the fix to this problem. Because my next step is going to an attorney and getting this resolved. Country: United States Make: Saturn Model: Relay Year: 2007 Already Tried: Everything of changing the senors multiple time and getting the sensors from the dealership, making sure her tires were good and inflated properly, changing a battery that went out recently and changing the alternator that wasn't giving out the correct voltage. the traction control light still come on right after picking it up from the mechanic.