The 2009 GMC Sierra 1500 Hybrid is available as a 4-door, 5-seat regular side. Starting at $41,540, the 2009 GMC Sierra 1500 Hybrid 3HA 4x4 is powered by a 6.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 20-mpg on the highway. The top of the line 2009GMCSierra 1500 Hybrid3HB 4x2 , priced at $ 44,525 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 22-mpg on the highway.