Yes Hummer does have a Truck. It is a two door two seat vehicle use by the Military.
Here is a link with some picture of them.
Also I have seen them for sale on the internet for as low as $ 25,000. used
http://www.qsl.net/ke6myk/greentruck/truck2/pics.html
http://www.geocities.com/Baja/8876/military.htm
http://army4x4.com/hummers.shtml
http://www.attilathehum.com/
This was just a few links I could find for you. Enjoy.