Watch out that the little bastard doesn't slap a mechanic's lien on your truck! A lawyer is mandatory here, as well as your local law enforcement boys. Did he give you a written estimate and a job completion date? Did you leave any additional parts for the job? He has to provide you everything the truck went in there with, period. If not, you sue in small claims court for the missing items, plus "$X"/day for him keeping you out of your truck. When you go to get your stuff, a cop and a couple of big, ugly, mean enforcer friends on your side help bunches!!!
Rotten SOB's like that deserve to have their crainial cavities permenantly inverted with their rectal cavities