2006 HUMMER H3 ADVENTURE, , Hummer claims the H3 is about the same length as a typical midsize sedan — and therefore is able to maneuver through urban traffic. When necessary, however, the H3 can demonstrate Hummer's famous crawling and climbing abilities just like its larger siblings. The H3's ground clearance is 9.1 inches, and it can turn in a 37-foot circle., , This is the first Hummer offered with either a manual or an automatic transmission. Its four-wheel-drive system is augmented by standard traction control and GM's StabiliTrak electronic stability system, which is also standard in H3s with an automatic. Sales began in spring 2005.