Probably for the same reason carmakers don't make certain other products.... ....MONEY! As interesting as the El Camino concept is, I do find a few shortcomings with the design: 1. Limited interior space, and you can only carry one other passenger with you. To fit a benchseat (there goes your individually adjustable bucket seats) would be problematic, as you would have either move the shifter much further up on the console or resort to (yuk!) a column shifted automatic 2. Limited room behind the rear seat to stow things or adjust the seat for taller drivers. 3. Insurance companies would classify this is as a "specialty two-seater" putting you in the same insurance market as a Chevrolet Corvette, Honda S2000, any BMW with a Z in its name, etc. Ouch!! $$ 4. Only one bed size. You could make other variations of it, but this would drive up the costs. Consumers would likely want other body variations, putting the cost even higher still. 5. Not everyone likes the El Camino bodystyle. You'd have to make enough of them to turn a profit, probably a lot more than would actually buy the thing. An open bed would increase the chance of theft, and creating a lockable, hard tonneau cover would increase costs even more (a cloth or vinyl one would not protect the bed's contents). 6. Many of the body panels are unique, meaning automakers wouldn't be able to share (rear) bodypanels among other models. This would increase repair costs. 7. Not many mounting options for the gazillion airbags safety mavens will want in this type of vehicle. 8. It's considered to be a somewhat top-heavy design (heavier front end, relatively lighter rear with an empty bed). Uneven handling might be an issue, not very well balanced with no roof over the rear of the car. Didn't mean to shoot down the El Camino idea, but these are just some of the issues you'd run into. Pontiac tried the El Camino idea with the G8, but found very limited appeal with consumers. Pontiac cancelled plans to produce it. GM pulling the plug on Pontiac (as well as every other Pontiac product along with it) further sealing its fate.