Can't recall seeing a truck with a name, though I suppose it's possible. Of course, in the case of a tank, the crew were more or less permanently assigned to it, and lived in or around one vehicle for an entire campaign, and would be inclined to personalize it. As far as I know, supply truck drivers tended to be assigned to a truck for a given run, but would have grabbed the next truck and load as it became available. Trucks that were permanently assigned to a combat unit, like a tank battalion's repair parts vehicle, might have the same driver for a more extended period, though.