They might not know how best to do them. I had an admin on a 3800 board once pull the LIM and UIM back off a car to replace an elbow. I said, "or you could have taken this one thing off". It was not a happy day for that guy.
Take that link and maybe give it a try. Or take that to them, say "BillBoost says it takes less than an hour for anyone." One hour of labor plus $4 elbows from the parts store and coolant.. poof.