Yeah, how many times have I seen "cannot duplicate"? Through all my Caddies, vettes etc the ONLY time I have had someone who really cared about getting it right is my Viper Tech. When they came out with the Viper, Dodge did a great thing-- they took the best mechanics at the dealerships and made them dedicated Viper techs. Granted, some are better than others.
I have had the same Viper tech 11 years and he has treated my 3 Vipers like they were his. I have NEVER gone back to him with the same problem twice. With my Vettes it is the luck of the draw--it might be a 40 yr old top gun or a 17 yr old oil changer.
My Caddy dealer is ok but i think the guys in the back treat the V no different than the 80s DeVilles brought in by the blue hairs.