Two Pickups with some similarities, but otherwise different in most aspects such as the horsepower, starting price, fuel economy, ground shadow size, height, and maximum occupancy. First of all, there is a $6,100 difference in the base MSRP. The 2016 Chevrolet Silverado 1500 Regular Cab has a higher starting price than the 2015 GMC Canyon Extended Cab. Also, the 2016 Silverado 1500 Regular Cab has a more powerful engine and gets 2 mpg less than the 2015 Canyon Extended Cab. In addition, the Silverado 1500 Regular Cab is both slightly larger and taller than the Canyon Extended Cab. And finally, you'll seat two more passengers in the Chevrolet Silverado 1500 Regular Cab than in the GMC Canyon Extended Cab. Among similarities is the body structure.