Autoweek is reporting that General Motors will unveil a Hummer H4 concept vehicle at the Los Angeles Auto Show, which kicks off on Friday, Dec. 1, 2006. According to the Autoweek report, the H4 will be smaller than current Hummers and designed to compete with mid-size SUVs such as the Jeep Wrangler. The H4 is expected to be a production vehicle for the 2010 model year. Little else is known about the vehicle at this time, other than the fact that it will not be a front-wheel-drive vehicle, according to one of the report’s sources. GM is also planning an H3 pickup, which would appear in the 2009 model year. The goal, according to a source quoted in the report, is to expand the Hummer lineup in the coming years. Stay tuned for more details.