Driving noticed speedo at 0 mph. Pulled over turned off truck and restarted. Speed showed for a few blocks, then went back to 0. Pulled over did the samething again. Any ideas, dont want to go in to dealer.

Go to the dealer. They will likely replace the cluster under warranty. Not much else you can do.

At least if the officer asks if you knew how fast you were going, you can say no and not be fibbin'.

I just went through the same thing two weeks ago. My speedo worked intermittently. Dealer replace the whole instrument cluster. Only had about 800 miles left on warranty. I don't know what a new cluster costs, but am glad that I didn't have to pay for it.