Brought my car in due to steering wheel locking in...

Brought my car in due to steering wheel locking in wet conditions causing me to almost run off the road. Went to a mechanic before taking it to a GM store and they noticed the issue, but did not know how to fix it. However, when I brought it to have an assessment and repair all they were good for is scamming me to put twould new tires on in order to drive for diagnosis. Left with two new tires but the real issue unsolved. They informed me that the car drives perfect, but this is far from the truth. Staff was friendly but unhelpful. I will never purchase a GM again.