The 2020 GMC Sierra 3500HD ... the diesel is ordered. The Sierra 3500HD is styled like the lighter-duty 2500HD, which in turn is inspired by the smaller Sierra 1500. That means lots of chrome ...

Two engines are offered on the 2018 GMC Sierra 3500HD, a 6.0-liter V-8 rated at 360 hp and 380 lb-ft of torque and a 6.6-liter turbodiesel V-8 with 445 hp and 910 lb-ft.