Based on the direction GM seems to be going in, I believe that the 07+ trucks are soldered in. I think I also read at one point on the Osram (company that makes sylvania lights) that they had a deal with GM for LEDs for that corporate green-blue they have been using since ~2006 on cars and 07 on trucks. That would suggest that they are soldered in. Don't quote me on that though. To reggiecab2000 - the climate controls are soldered in and will require LED's with resistors, unless you can find a preassembled LED assembly that would have a base, resistor, etc. all ready to solder in. (you might try superbrightleds.com for that, but I'm not entirely sure). The headlights switch is a PITA just because its all aluminum contacts and the solder wont stick to it. If you look through my thread, I mentioned how to do the headlight switch in order to get it to work but I didn't take any pictures. Let me know if you do decide to do the rest of your lights, and I will pull the headlight switch and take pictures. Also, I could look through my pictures and pull the climate controls if my pictures dont show, so that you could save some time by having all the LED polarities correct. I would also add that information to my existing thread for anyone else to use. The only switches I'm not familiar with are the window/door lock/mirror switches because I don't have them. They shouldn't be any harder than the climate controls though.