The 2017 GMC Sierra 3500HD is available as a 2-door, 3-seat regular side. Starting at $39,025, the 2017 GMC Sierra 3500HD Base 4x4 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 2017GMCSierra 3500HDDenali 4x2 Crew Cab Long Box DRW , priced at $ 55,615 , is powered by a 6.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated