My son has purchased this car new 07 Cobalt 2 dr with a 2.2 engine, he has 69k miles on it 90 percent highway miles, back in the fall he was telling me there was a rumble type noise in the front, I took the car for a ride and it seemed to be a out of round tire, they were bad, I had the front end aligned and installed 2 snow used snow tires for the winter, they were balanced, it was a little better, now he notices the passenger front tire is cupping bad on the inside, not sure if alignment or balance relates to this issue, but he wants me to take the car somewhere else for a alignment, he thinks the guy who did the alignment in October did not do a good job, I can't say, he says the car at times wanders around on the highway, what can I look for, I have my own wheel balancer, should I check the balance. I have new tires on the rear, I was thinking of putting them on the front and take it for a spin and see if that helps, any suggestions
thanks Chet