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 2017 GMC Sierra 3500HD Denali 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