I don't know for sure, you will have to call the local DMV and find out 1-800-932-4600
Most trucking companies however, are going to want to hire people with Diploma or G.E.D.
If you are able to get it, I would get it.
Times are only going to get tougher without having it. And it is probably going to be harder and more of an inconvenience to get it later, so why put if off.