Stereo & Electronics - Stereo lighting

I have a 01 Z71 with stock Delco CD/Stereo. The backlighting on 2 of the buttons have gone out. #3 and #6 are dark. I pulled the faceplate off but it looks like an integrated circuit board behind it. Does anyone know if I can replace the lights or someway to get them to light back up? I sure don't want to replace the unit just to get a couple of lights to work. thanks.

Midnight F-117A replaced the bulbs in his F-body Monsoon headunit with LEDs:
http://www.ls1tech.com/forums/showthread.php?t=113734&highlight=led

Thanks for the lead. Looks a little techie for an all thumbs type like me, but I'm game to try anything.