Chevy Dealerships are the Worst!

Why is it that service managers do not know how to do their jobs? I broke a DSS shock and the manager had me drive in since he needed to send pictures of the shock to Chevy to see if it could be replaced. Turns out the shock isn't under a mileage warrantee but its covered if under three years of purchasing the truck. If you knew your job you could of saved me the time to drive in and do all this why not ask for my VIN over the phone look up my warrantee and tell me over the phone!