The 2008 HUMMER H2 full-size SUV shares platforms and powertrains with the Chevrolet Suburban. this is an upgraded V-8 engine. The 6.2-liter eight-cylinder is rated at 393 hp and gets teamed with a six-speed automatic transmission; together, they help the H2 boost their towing capacity up to 8,200 pounds. It helps the H2 reduce its acceleration, GM's six-speed transmissions are among the best in the truck market, and this one's no exception. Ashton 0711651126 See more details and contact the seller