GCD is the only place I plan to go from now on for all our service needs. We drive two VW TDIs and I know cars pretty well, so being lied to by the stealership is especially irksome. My wife's Passat TDI had a CEL (which Esserman scanned as an airflow issue) and, from her own description of its operability and my driving it, I could easily diagnose as a simple boost leak. The dealer had tried to convince me (as if I don't know better?) that in addition to that split tube I'd need to replace the rear main seal (a simple but time-consuming and thus expensive and totally unnecessary repair) and even claimed on their sheet (I picked the car up unrepaired) that my wife stated she saw oil leaking: a blatant lie. I went to GCD on a friend's recommendation and in just a couple days they found the source of the air leak, picked up the part, did the work, and sent us on our merry way with a properly operating TDI. That they work quickly, efficiently, and most of all honestly are all I need or expect from a mechanic, thus all our scheduled service from now on will be there only. Thank you!