I hope this is the right place for this....anyways...the wife was driving the truck the other day...2003 duramax 2500 and she tows horses...now, none of my guages are working... no speedometer, oil, temps.....all at zero. Can't find a fuse for this but I may be blind....truck runs fine by the way. Any help would be greatly appreciated.

I've heard of this caused by low system voltage, which could be cause by one or two bad batteries.
Have your batteries load checked, and check connections.
There had been a TSB on this.