It's been a long, long time since mechanics actually worked for the dealerships. Now most mechanics are basically independent operators working in the dealership shops. They get paid according to the Chilton manual estimates for working on problems. So if there's a loose bolt causing an oil leak but they can sell it to the Service Manager as something more significant, they'll get paid for repairing the bigger issue even though it only takes them a minute or two to fix the real problem. Then they can move on to work another vehicle - time is money.
Best to stay away from dealerships, even for warranty work. In warranty work the factory will only pay for a clearly identified problem. So if the problem the customer reports could be caused by three different things and they don't know which one it is, the dealership won't want to work on it because if they guess wrong they won't get paid.
Learn to do your own work or find a good independent shop and build a good relationship with them for any repairs. An alternative is if you really have to take it into a dealership, take it to one other then the one you purchased the vehicle from. Chances are they'll assume you're upset with the selling dealer and they MAY work harder in the hopes of getting your future business.
