speedometer reads 60 at start up or it will stick at a speed till restart.

Sounds like the motor in the cluster for the speed odometer is bad. It's also possible that there is a wiring issue to the speed odometer but since your problem goes away after restarting the van once it sounds more like the motor.

Common failure of the clusters. For repair of 2004 Chev Ventures Instrument clusters and many other GM Instrument Clusters go here: http://www.mrwhizard.com for more info.