1995 chevy z71 instrument cluster problem

I have a 1995 Chevy Z71 5.7L 350 that every once in a while the tachometer and speedometer go to 0 when driving. Once it happens you have to pull over on the side of the road and turn it off and wait 5 seconds and then start it and it will work fine. It doesn’t do it all the time but I changed instrument cluster and the new one does the same thing. I also changed the speed sensor. Does any one know what could be causing this to happen?