Other Fuel System Tank Assembly problems of the 2008 Chevrolet Tahoe

I drove my vehicle in the morning and then parked it for about 2. 5 hours. When I started my vehicle the gas gauge showed my car was empty, even though I had just recently filled up and had only gone about 80 miles on the tank, my airbag readiness light stayed on, and none of my gauges were functioning. Also, the light for the passenger air bag above my review mirror didn't illuminate at all. I drove it for a few seconds and tried turning it off and then back on, but nothing changed. After driving it for a few miles, I parked and turned the vehicle off again. When I turned it back on, everything began working again. I believe this is an electrical issue, but when taken to the dealership, I could not get it to replicate the issue. Besides the obvious danger of not having any gauges while driving, my fear is that the airbags would not work properly in an accident.