The 2011 GM heavy-duty pickups get a new Duramax 6.6L diesel engine, upgraded frame and front axle increasing cargo capacity, towing capacity and fuel economy.
2011 GM Heavy-Duty Pickups Get New Diesel Engine, Other Upgrades
The 2011 GM heavy-duty pickups get a new Duramax 6.6L diesel engine, upgraded frame and front axle increasing cargo capacity, towing capacity and fuel economy.