If there was an actual agreement between you and your father that he would pay rent or storage charges for keeping his truck in your garage, then you could present a claim to his estate for  any unpaid amounts--and sue the estate if it won't pay. In the absence of an agreement, however, you have no right to be paid for  it--that is, if you'd been letting him keep the truck in your garage for  free, you can't now retroactively say he had to pay for it.You can let the estate know that they must retrieve the truck within a reasonable time period (e.g. 30 days) or you will dispose of it. Send any written notices in some way or ways you can prove delivery. You do not have to keep the truck there forever.