G.M. builds the Chevrolet Colorado in Missouri

At its assembly plant in Wentzville, Missouri, Chevrolet manufactures the Colorado. That is unlikely to alter any time soon

The Colorado is your next truck if you're looking for an American-made pickup truck with a lot of domestic components.

There are more American-made trucks in the top 25 trucks. 

The U.S. and Canadian content of the Chevrolet Silverado 4WD 3.0L T.D. and LTD RST 6.2L V-8 is 42%.

In the end, sport utility vehicles dominate the list by a wide margin

Given that American drivers appear to favour SUVs above all other vehicles

it stands to reason that manufacturers would have a wide selection.