Silverado Instrument light problem

I have a 2000 Silverado, and a couple of weeks ago i pulled the radio to hook a new antenna up. now the lights in the instrument panel will not come on. the radio and A/C lights come on during the day, but when the headlights come on, all my lights go back out. i can't see nothing inside my truck at night. i checked all the fuses and they look fine from what i can tell. please help, i am clueless on this one. thanks for anyone who can help!

Check to see if you knocked the plug loose from the light switch. Also if you removed the dash cluster from the truck, it probably is not plugged into the circuit board right. Remove it again and check the connections.