No lights on Gauges

[enfuego02]

Help me please...everytime I bring my Hummer H3 in for a routine service the dealer decides to break something else. Does anyone know why at night when the headlights are on my instruments are not lit up. The whole left side area by the steering wheel is not lit except for the fog light button. Also all three temp and fan control buttons and the rear wiper button are not lit up. The radio still works, all the fan buttons work but you can't see them at night. I thought it was a fuse but I can't seem to find which one it might be. The dealer was working underneath the dash to fix a vibrating problem maybe they knocked something loose.
PLEASE HELP ME!!!

I think they messed up my whole electrical system. As i was driving to work just now I saw my cars refelection against a building and noticed the daytime marker lights were not on. they are set to be on when driving...I have no idea!!!!