Part of the fullsize pickup segment, the 2018 GMC Sierra 2500HD diesel Double Cab competes with the Chevrolet Silverado 2500HD diesel Double Cab, the Ford F-250 SuperDuty diesel SuperCab. A base price of MSRP $46,595 gets you a 6.6L Turbo V8 and a 6-speed automatic transmission. Despite the price going up to $57,195, this single powertrain is found in all 3 trims. This engine produces 445 horsepower and 910 lb-ft of torque, achieving a 0-60 of 6.5 seconds, and is offered as both an RWD and 4WD. The GMC Sierra 2500HD diesel Double Cab offers 6'5 feet and 8'2 feet cargo bed, with 3,093 pounds and 3,276 pounds of payload capacity respectively. It also offers a healthy towing capacity of 13,000 pounds.