If you want to sound smart tell the guy if he can’t fix it to give you your money back and you will go somewhere else!!! I hate it when people try to get over on other people. You shouldn’t have to sound smart. He is a professional offering a service. If he can’t do it then he needs to tell you. The difference between him and the other mechanic is at least the other guy was upfront with you about trying to steal your truck and offering you no were near enough money. This guy is just trying to make it seem like your truck cannot be fixed.