Total Dash Blackout, well almost
 

So I started my 3 to go to work about a month ago. I got in turned the key, check engine light came on like normal, went off once I started engine. Put it in gear and noticed none, I repeat none, of the lights in the dash/gauge cluster/info panel whatever you call it was on. Not even the transmission selector light, odometer, nothing. But radio, 4x4 selector, and interior lights all worked. Drove to work using GPS for speedometer. Tried twice at work and nothing. Called Independence Hummer in Charlotte and of course they said bring it in. Checked the fuse marked "Cluster", it was fine. When I started off for home later that day, everything was fine. Hasnt happened since. Do you think maybe that fuse just shook loose somehow?