Soo maybe I'm a little OCD

[scubasteve4212]

Yeah so I might take a little too much pride in the 'Nali but I've had a couple of the backlights on the steering wheel controls go out and have some fog in the fog lights... which is a little ironic, but annoying all the same. Any help would be much appreciated!

 

[MrBalll]

We've had many topics on this stuff. I'm sure the Denali is the same, but you will have to replace the entire button piece, not just the light. It's also a pain to get in and out from what I remember reading.
For the fog, either drill a little hole in the bottom of the housing, or just pull the bulb out on a hot day and let it dry out.

 

[Wake]

I replaced a fog on my Escalade for the same reason. It was a $20 part off of eBay (non-OEM) but works just as the factory and only took about 20 minutes to change out.

The switches, as Mr Ball described are pretty difficult to replace from what I understand because there isn't a lot of slack in the wiring to work with. Some have replaced their bulbs but for $20 a switch, it would probably be easier and more cost effective to replace the switch. I want to do a couple on my Escalade soon, one switch lamp is bunred out but another one has a lot of chipping of the black paint on it and annoys me.