"Any suggestions on what charities"

Well, I have a membership in Guidestar and use their resources to do my research. You also can use something specific, such as Donorschoose. But, giving a vehicle can be to the organization or For the organization. Example: you give a van, and the church or school or pet rescue uses the van. Or, they sell it and the proceeds are theirs to use. Or, they raffle off something and get proceeds this way. Because of covid, these types of things are handled differently, so your first need would be to find someone wanting to accept it.