The lightest current F150 is 4680 lb. 4x2, single cab, short bed, V6. 700 less than that puts it below 4000 lb. A Camaro SS weighs 3900 lb. For a truck with nearly a one-ton payload capacity (1700 lb in that config), that's mighty impressive.
http://www.ford.com/trucks/f150/spec...ions/view-all/