The truck will also be the only off-road-focused production truck in America to offer the choice of gas or diesel engines. While the all-new 3.6-liter V6 and its class-exclusive Hydra-Matic 8-speed automatic gearbox come complete with 308 horsepower and 275 pound-feet of torque, it’s the turbo-diesel upgrade that has our vote. GM’s Duramax diesel may only be a 2.8-liter four-cylinder that generates 181 horsepower, but it puts down a ton of twist, with 369 pound-feet of torque being the magic number. The best part is that even with all of these 4×4 upgrades, the ZR2 Colorado can tow up to 5,000 pounds or 1,100 pounds of payload, something that typically gets downgraded on performance pickups.