The 2009 GMC Sierra 2500HD is available as a 2-door, 3-seat regular side. Starting at $33,625, the 2009 GMC Sierra 2500HD SLE 4x4 Regular Cab is powered by a 6.0L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2009 GMC Sierra 2500HD Work Truck 4x2 Extended Cab Short Box, priced at $29,895, is powered by a 6.0L, 8-cylinder engine mated to an automatic transmission that returns an EPA estimated