The 2014 GMC Sierra 3500HD is available as a 2-door, 3-seat regular side. Starting at $37,520, the 2014 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 2014GMCSierra 3500HDDenali 4x4 Crew Cab Short Box , priced at $ 52,500 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated