From the Drivers Seat
 
The switch box is for control of my overhead floodlights, rear light, by-pass for the Pre-luber & Day Time Running Light, and remote garage door controls. The box is connected with a modular connector that makes for easy removal for service or to prevent other from using them.  The switches are connected to heavy duty relays down on the driver's side kick panel.
My GPS III is mounted on the dash as show, and is in a good spot for viewing while on the move. The GPS is wired to external power and antenna.  Next to it is the window defroster that I added to keep the glass warm when needed. 
 
My notebook computer is held down in place with Velcro on the dash and edge of the glove box.  The notebook has Delorme Street Atlas USA and Telephone directory on it, making it great for use on the road. It is also wired into the GPS so that it keeps track of your location right on the map.  No excuse for getting lost, or not having the phone numbers to residential and businesses. Below  in black and to the back is the extra A/C unit I added.
92, 93, and I think 94 Hummers do not come with any cover for under the dash, and after seeing the 95 & newer with then, I ordered the parts. I found out later that the cover for the 97 Hummers didn't have the round hold above the gas pedal, in stead it has rectangular holes that look a lot better. In the photo is the under dash panel, and the side panel,  not shown is the fuse panel cover, latch, and the mounting rail (I used an "L" strip of aluminum that mounts below the fuse panel).