I went to get my oil changed and tires changed at the auto center here before a big move. I discovered two days later they had overfilled my engine with oil, which they did drain and replaced for free and even "took a good once over" of my car because it had been acting funny since they did all my work. Well after a suggestion that my entirely new axles were "going to give out at any time" I brought the car into a real mechanic shop and discovered the tires this walmarts team had put on my car were completely loose and lugnuts were barely holding the tires on. This after telling them there were strange noises from my car and even having a test drive so they could hear the noise and they assured me it was nothing they did to my car.
In summation from this rant- worst Walmart car support ever- the people don't care and will probably cost you more money in the end and act annoyed when they have to deal with your legitimate concerns.