Dash says unknown driver,door locks, window's, radio,and dome like dosent work.i have 2 keys and 2 remotes neither will work. Truck turns over and runs for 2sec then shuts off. Battery is fully charger and never was dead.

 

Ended up being some corosion on the ecm terminals

 

I am having this same problem on my 04 silverado. I am able to drive mine though. I disconnected my battery for about a half hour and reset the key fob. This worked, but the next day it happened again. I just tried it once more and will see if it works right tomorrow. Where were the ecm terminals? Sounds like I may want to check these on my truck. Thanks!

 

On my truck it is to the left of the battery and down under a black cover

 

Fixed it! Found the issue on mine. The dash lights would cut out randomly and leave nothing but the gauges working. Then it would give me unknown driver and not start, no radio and no dash. Some days we would go to start it and the battery would be dead. Ongoing issue, intermittent. Today it stayed on unknown driver long enough for me to troubleshoot so I: 1. Put key in the ignition and turned it to On 2. Removed the fuse cover under the back seat. 3. Pulled module fuses until suddenly the door ajar started sounding and the radio came on. 4. Looked up the fuse location. For me it turned out to be the PDM, which stands for the passenger door module. I have had issues with the passenger door electronics before so this didn't come as a great surprise. It seems any module that is connected to the BCM; DDM, PDM, Radio, Ect.. can cause this kind of issue so just remove power from each of the modules until you find the culprit. Best of luck.