Follow Up: I read the trouble code today and got code 24 - Vehicle Speed Sensor... I thought this truck was still old enough to have a manual cable speedometer.. found out today I was wrong. I'm going to check the speed sensor today and hopefully get it replaced. The bad part is the one for a 4x4 is about $30 more than the one for a 2wd truck. Go figure.
Also, I've been wanting to find a cluster with a tach in it for quite some time. I've decided that now may be as good a time as any to find that. Would this cluster I have found work?