Try Woodys garage over in UC address is 118e byrd phone # 210-658-6655. There a good bit more reasonable than Gunn. And a lot faster. Also try Pep Boys on Nacagdoaches, but You will have to be at their doorstep when they open in the morning, or You will be camping out at their store for the rest of the day.
BTW I just had to have work done at gunn and they tried to charge me double. You might want to check in buying one of those aftermarket service plans. May save You a few bucks in the long run.