Part of the fullsize pickup truck segment, the 2012 GMC Sierra 3500HD Diesel Regular Cab competes with the RAM 3500 Diesel Regular Cab, the Chevrolet Silverado 3500HD Diesel Regular Cab, and the Ford F-350 SuperDuty Diesel Regular Cab. A base price of MSRP of $37,790 gets you a 6.6L Turbo Diesel V8 engine and a 6-speed automatic transmission. Despite the price going up to $40,540, this single powertrain is found in both trims. This engine produces 397 horsepower and 765 lb-ft of torque, achieving a 0-60 of 7.4 seconds, and is offered as both an RWD and a 4WD. The GMC Sierra 3500HD Diesel Regular Cab offers a single 8 feet cab with a payload capacity of 4,625 pounds. It also offers a healthy towing capacity of 13,000 pounds.