DETROIT (AP) — Ford's Super Duty trucks are getting a new aluminum body, just like their smaller sibling, the Ford F-150 pickup.

Ford's 2016 F-250, F-350 and F-450 trucks sit on a new high-strength steel frame and have aluminum body panels. The materials help shave up to 350 pounds off the vehicles' weight, making them more nimble and fuel efficient and increasing towing capacity.

Ford will offer three engines: a 6.7-liter V8 diesel, a 6.2-liter V8 gas engine and a 6.8-liter V10. Fuel economy hasn't been released.

Ford is also adding features, including blind spot detection, lane departure warning and LED lighting in the cargo box.

Super Duty work trucks make up about one-third of Ford's F-Series sales.

The 2016 Super Duty goes on sale early next year.