I did a search here and a google search and can't seem to find an answer. The other day I noticed that the drivers side door switch panel does not illuminate except for the front windows. Is this just a bulb replacement? Anyone else ever have this problem?

 

I had the same issue but reversed, everything was lit except the front window buttons. I had the dealer replace the bulb when i took it in for other service.

 

I will take it in to have it looked at when I go for service. Is this something I can change? Anyone know what size of bulb?

 

It is a simple bulb replacement but as far as I was told by the dealer, GM don't make the bulbs. You have to buy the whole assembly which don't quote me but I seem to remember being well over $100. I asked them to change it under the warranty and they suddenly found a couple of used bulbs which they said they keep from time to time....
Good luck