To follow up with all of this:
1. Fixed, by uh replacing the light bulb.
2. Are there any visual guides anywhere for this? From what I've read, it'* possible that replacing the fuse for this part can maybe fix the code. http://www.gm-trucks.com/forums/inde...howtopic=38241
. Does this apply to my car?
3. Photo of the other plug in the trunk
I really wish I didn't have to ask all of these simple questions, but they don't make Haynes manuals for these cars. Thanks everyone for your help!