Over the past two decades, America has become a land of truck drivers as SUVs, crossover SUVs, minivans and pickups have grown to account for the majority of light vehicle sales in the United States. In fact, the most popular vehicle in the world for more than three decades has been the Ford F-150, which, according to Morgan Stanley, accounts for 90 percent of Ford Motor Company’s global profits.

Given that kind of profit margin, and considering that in a typical year 16 million new vehicles are sold, there’s a huge incentive for auto manufacturers to try to introduce unique trucks in an effort to expand their existing model lines and fatten corporate treasuries.

For the most part, these efforts succeed. Neither a Cadillac Escalade nor a BMW X5 seem as strange as they did a decade ago. But here are other efforts that seemed like a sure bet but somehow missed the mark.