The first thing anybody needs for their vehicle is a stereo. It doesn't matter if you have a truck or a car. A great place to check out stereo equipment is Crutchfield.com. Here is a list of manufacturers...
I personally checked out some of these sites just to see what they have. Then I went to WeeBee Audio and found a receiver, the KDC-PS709, that I liked. Although the Head Unit is the most important purchase, according to me, there are others that you make also. The next purchase that I made was my 4" Eclipse coaxials. (Thanks to my brother for the installation) These puppies sound extremely good. Finally, I received a pair of Alpine 3-way 6*9s and boxes. These puppies sounded good, but there was one thing missing. Bass, I mean the speakers had bass, but it was extremely tight because of the sealed enclosure. So my brother and I drilled two 1 1/4" holes in each of them. After that, the bass sounded pretty good. There was still one thing missing. I couldn't put my seat back the whole way. (as you can see it's not extended cab) Well, I finally decided to build a board that my 6*9s could lay in.
Me, being the customizing nut that I am, I felt something else was missing for my truck. I wanted lighting. Lighting is a very important part. I decided to order some neon tubes from my trusty Crutchfield catalog. So, I ordered them and a few days later they arrived. Now, for pussies, they come with cigarette lighter plugs, but I wanted to be a real man and hard wire them.
Remember, before messing with anything...
Finally, I found spots for placing my neons. I had the black light hooked up to where my interior light was, but it got annoying not being able to see things at night. So, I hooked everything up to switches. My red neons are under both my seats, and my black light is up above my seat by my interior light.