4WD and Dark Titanium w/Cloth Seat Trim. I'm ready to work! Tried and True champ! There is no better time than now to buy this reliable 2012 Chevrolet Silverado 2500HD, ready to get on the job and get going. Whether you're sitting in the driver's seat or standing next to this 3500HD LT, you'll be impressed how quiet the turbocharged Duramax 6.6L V8 is. Sure, it's still a diesel, but the normal noises are significantly muted at idle. The engine is also quiet at highway speeds, where it's effortlessly strolling along under 2000rpm.