Currently, if you want a regular cab short box Silverado truck from Chevrolet, then your options are limited. "There were some decisions made to only do a regular cab long box Silverado… it's only a work truck," Chevrolet Silverado Marketing Director Hugh Milne told Muscle Cars And Trucks (MC&T).

The regular cab only comes with an 8-foot bed but Milne told MC&T that, due to customer demand, Chevrolet is now looking into offering the regular cab with a short box. The hesitation comes from American Corporate Average Fuel Economy (CAFE) standards and what's known as the "footprint rule."

The "footprint rule" is centered around the size of the area covered within all four wheels of the truck, and the larger that footprint gets, then the more forgiving the fuel economy standard gets. Physics dictates that the larger and heavier the vehicle, the harder it is to keep the MPG count down.

To make things more complicated, the EPA fuel economy estimates are also averaged out by make and model. Hence, you end up with the true "Cowboy Limo" being the biggest truck because it can add the extra weight of options with the most leeway given to the final MPG number.

Does Chevrolet's willingness to look at more regular cab options mean we could see a Chevrolet Silverado Regular Cab Trail Boss, or a Regular Cab GMC Sierra AT4? As MC&T points out, the only way you can get either of those specific models is to go to the Middle East markets where fuel economy standards are different. Well, enough people would have to want those specific layouts for Chevy and GMC to do the complicated math, engineering, and re-jigging of the lineup to make that happen.

A shorter regular cab Silverado Trail Boss would make sense from an off-roading standpoint, but we're not sure the demographic buying those trucks would want anything less than a crew cab.