03 Yukon SLT 4x4 202K miles, speedometer would work fine, quit while driving, start again within a minute and be fine for weeks, then do the same thing again once in a while. This happened a handful of times. Then one day it quit and never did come back to life. It is the only thing on the instrument cluster that isn't working. I was told that there are two sensors on the transmission/transfer case, that could be the problems. I know a guy at the parts store that is pretty smart, and he said that they were common parts to need replaced on these vehicles, I changed to cheap one, and it didn't fix it. The other one is more expensive, but I was hoping for some input before I go to throwing more parts and money at it without knowing what will fix it.