07 Avalanche LTZ
 

I recently had an issue with my battery, started and drove the vehicle one night with no issues, got in the next day and barely had any lights in the vehicle. I took the battery out had it checked out it, needed to be charged, charged it for a couple of days, put it back in, took it to have it tested, said there was a bad cell in the battery. Got a new battery, put it in, went to start the vehicle and have no gauges or DCM whatsoever working. I have taken it to my mechanic, taken out the instrument cluster and checked the board, still not working...
2007 Avalanche LTZ 5.3 4X4
Anyone else with this problem?