All dash light flashing after dead Battery

[BillMoulton]

I found my battery on my '08 Tahoe today was dead.
I put it on charge for about 30 Min. and it started and runs fine.
When I drove off I noticed that all of the warning lights and dash light are
flashing on and off, the Sped. and Tac. don't work but will move as the lights flash. The radio works. A/C is not working.
Anyone ever see this before?

 

[lesterl]

Unhook the battery and wait a couple minutes then hookback up and restart. How old is the battery? Might replace it if it is aged 5+yrs. Current draw for start probably dropped the voltage for the Dash electronics and corrupted its programming and possibly the battery unhooking will take care of it.