ESSC is my go to place. They are honest and do excellent work. I recently brought my 2003 Chevy Silverado that has 261K miles on it for an emission's check and they noticed my reverse lights were not working. It could have been a hugely expensive replacement of the body control module ($1000ish) but they fixed it for $59, basically a diagnostic fee and replacement of a fuse.
I highly recommend ESSC for automotive service and repair (and they also are very reasonable for tire replacement).