Ray Huffines Chevrolet

First i want to say My 2004 Corvette is in pretty good condition, has been a daily driver for 4.5 years without any issues and 57000 miles, slightly over 10k miles per year. I am going back to the dealer and will try to get some assistance in understanding the following. Took my Vette into the dealership needing the following: 1.) 4-Wheel alignment 2.) Diagnose, Engine in Reduced power mode due to ingesting water at carwash....??? really no kidding normal manual carwash cleaning entire car and engine bay... 3.) oil change 4.) odd ticking/tapping/sewing machine noise that changes with engine RPM... Lifters, Valves? What was good and what is bad... first the good: Good: 1.) 4-wheel alignment 2.) Diagnose "Engine in Reduced Power Mode" Replaced Throttle Body... 3.) Oil Change BAD: 1.) Price of Throttle body was over $700 and $900 with labor. I searched the net and Could Not Find a Throttle Body for more than $500. Wow huge Markup and seems to be used not new part also. 2.) After completing all of the GOOD items still had a ticking/tapping/sewing machine sounds that change with engine RPM. 3.) Shop Recommended dissassemble top half of motor to find tap, states may be a bad lifter or 2 so i approve an additional $500 engine teardown, I am than told I have a couple of bad Lifters and will cost an addition $3500. to rebuild and replace ALL of the lifters and head bolts and gaskets, i can understand the gaskets for a rebuild. 4.) I pay just under $4400. for a top half of engine rebuild, Oil Change, Wheel Alignment, Throttle Body replacement and Labor. 5.) driving home the ticking/tapping/sewing machine sounds are very apparent with zero change in volume pitch or otherwise. 6.) stop by another local shop and have them take a courtesy look and they say it looks like the squeeking is coming from one of the pullies or belts not the engine... 7.) I will go by Huffines Chevrolet Plano, TX again tomorrow and very nicely ask why i paid so much for something that is not even fixed...??? 8.) maybe i am just dumb for expectiong that a Corvette Certified Mechanic in a huge Chevrolet Dealership can tell the difference between a Lifter and belt/pullie??? I will report back to this review with my experience after tomorrow I do not have any bad feelings at this point and have been a customer for over 2 years, I believe it to be an honest mistake on the Mechanics part and I am sure the Manager will help correct the situation.