The 2013 GMC Sierra 3500HD is available as a 2-door, 3-seat regular side. Starting at $35,760, the 2013 GMC Sierra 3500HD SLE 4x2 Regular Cab Dual Rear Wheel is powered by a 6.0L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2013GMCSierra 3500HDDenali 4x4 Crew Cab Short Box , priced at $ 50,740 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated