I have a 2006 Chevy Silverado with several missing lights on buttons. See pictures below. I have seen in a couple places that they are soldered on and you can't replace them. Is this true? If not, how do you fix them?
Yes, you can replace the bulbs, but it's not the easiest thing to do. You need to have patience and a soldering iron. Many people take this time to replace the bulbs with LED bulbs, in a color of their choice. It's also recommended that you replace all of the bulbs at the same time to alleviate having to tear it all apart again in the near future for the same purpose or so you don't have some bulbs brighter than others. Here are some examples which should prove good for you.