Alright guys so this morning I went out and started the truck and gave it a minute and rolled off about 3 minutes gown the road at 30mph the check Guage light came on and I looked at the dash and the volts were all the way down. I turned into a lot and shut the truck off and did a Guage function check the volt Guage worked so I just started the truck and continued my 150 mile trip this morning with no further problems. The volt Guage stayed at about 15 the entire trip. Any ideas?

The first thing I would do is get the charging system checked to see what it's actually charging at. 15 volts is high enough it could boil the battery.  There are a few different things that could cause this so you need verify if it's actually over/under charging.