Controls out.
 

Hi. I have a 2000 Sierra 1500. Out of the blue, my A/C Heater controls stopped working. The 4X4 controls stopped working. The cruise controls stopped working. and the digital desplay on the dash are out. The Message center light shows a bright RED battery. All this went out at the same time. All fuses are good. The egnition switch is good. any ideas what I can check.
Im lost.