Pep Boys sucks
I made the mistake of buying tires at Pep Boys and I too have a vibration problem due to the *** quality tires that can't be balanced properly.I got there road hazard warranty so I brought my tire in to have a nail puncture fixed.
They put a plug in it and suposedly patched it from the inside but the tire has another small nail near the edge of the tead that they missed. When I took it back they said they couldn't fix it because it was too close to the edge which is ***. You can't fix a hole in the sidewall but this was clearly in the tread!
When I took it to a real store (Discount Tires) they poloitely told me they couldn't help either because Pep Boys had ruined the tite when they plugged it which is the truth.Bottom line avoid Pep Boys for just about everything.