Do you have the cluster removed from the truck??? There LOTS of links and such here on how to get to the gauges. On the back side of the cluster, there's 6 black deals. Make a lefty loosey for a quarter turn on the black deals, that removes the light bulb holder. Then pull out the bulb from the holder, replace it, and put the holder w/ new, bulbs in it, back in place.
hoper that made since.