No electrical? Turn the key and nothing happens?

I have a chevy Tahoe and it is not getting any electrical power at all. The battery is fully charged. The truck was running fine I shut it off and then came back out and there is no power to anything. I checked the battery and I think all the fuses are ok but no luck in restoring power to the truck

I found the problem it was a bad positive cable.

Thanks

My Tahoe has a fairly new battery, however, I left it sitting for the winter to save gas. The battery died. It is fairly new (1.5 years old). I charged it after filling the battery with distilled water. The battery seems to have a good charge. However, when I tried to start it today it seemed to turn over, then simply and abruptly stopped. Now, I have absolutely no electrical power, the dash lights do not come on, nothing works. No electrical power at all. Did I blow a fuse or something? It has never done this. Each spring I charge it up and it starts right up. What is wrong please, if you know. (PS- the motor was overhauled a couple years ago and it is in great shape mechanically)

I think I found the problem. I tested my battery; it is an 84 month Autolite and in good shape, putting out 13.9 volts after a 4 day 5 amp charge. I took the positive connector off of the battery and as I removed it my lights came on and off with the sparks. I put my battery charger on the the red main line and the car lit up like a Christmas tree. I got power Scotty. I have a dirty corroded positive main battery connector. I will be cleaning it or replacing it tomorrow. Really appreciate your input, it was that input that helped me check the battery and eliminate other issues to focus on the actual problem. I should have known that with the bad winter and 10 below temp's the lead and iron would be corroded from the freezing. First some battery cleaner, then some some fine filing, then some electode conduction paste and I should be good to go. Thanx again