Changed alternator, no heat and air?

[borrowedchief]

2 Days ago I changed the alternator on my wifes 03 Tahoe. After everything was fine, til the next day I went to drive it, and noticed the climate control panel was not illuminated. Buttons are lit, but the actual display does not light up. Buttons are not responsive. No heat, A/C, defrost, or fan. The rear climate controls still work though.

I checked the fuses, and none looked blown. Has anyone ever seen this? Am I missing something simple that I disconnected and did not reconnect?