Done lights and map lights not working, even manually?

The first thing to do is check the CTSY LP fuse #58 in the engine bay fuse panel.

Here is a guide to help and the fuse locations as well:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the fuse is okay swap out the courtesy lamp relay i the left side fuse panel (BODY), this is for base models only. Here are the dome light wiring diagrams so you can see how the system works. Check out the images (below). Please let us know what happens.

I pulled the fuse #58 and it was blown. When I replaced it the new one blew instantaneously. Did I do something wrong?

Ken L., Also just wanted to clarify that all other electrical components seem to be working properly. Headlights, turn signals, power locks, windows, power mirrors, front rear wipers. Etc. The problem seems to only be map lights, dome lights front and rear. Like I said, I replaced the fuse, and it blew instantly. Thanks for your time, if you have any other ideas how to proceed. 2002 suburban Lt 4wd. No sunroof.

You didn't do anything wrong; you have a short in that circuit, I would remove the dome lights and look for one of them being melted also check the bulbs and the sockets for damage. 9 times out of 10 this will be the problem.

Thanks Ken, I will let you know the results when I get the chance to look at them. I appreciate your help.

You are welcome, please let me know how it goes.

Ken. I didn’t check all the bulbs, but a ground wire looks like it snapped off from the connector. I am going to see if this fixes the problem. Any advice on this? The ground wire I question runs up to the hood light and into the firewall.

Is that a wire that is broken? If not, this will not be the problem, you can try fixing it to see if the fuse blows, the under-hood light can cause the fuse to blow, can you check it to see if it was overheated?