Buick Repair Questions? Ask a Mechanic for Answers ASAP
Have you removed and cleaned all 4 of the wheel speed sensors yet?
Each wheel has a speed sensor. This is the information the vehicle uses to know when a wheel is slipping to turn on the traction control. Many times it just gets rusty or dirty and a good cleaning will do the trick. If that does not do the trick one if likely faulty. You can test these simply using a volt meter on AC volts key on with wheels off the ground backprobe with a paper clip or similar turn the wheel with volt meter connected as you move the wheel should give out a reading if not sensor is bad.
On this model the rear sensor is built into the hub but you can still check and make sure no damage to the wires and do the test if the front ones being cleaned does not fix the issue. I have loaded the steps below.
Let me know if you have any additional questions.