8. With the EcoTec3 engine in place on the chassis and the wheels and tires bolted on, the Sierra chassis receives its new rear bumper with integrated step. Convenience was a big part of the design influence, and when we spoke with Jeff Luke, Executive Chief Engineer Global Fullsize Trucks, about some of these new features he explained to us, “The 2014 GMC Sierra has an extensive list of new technologies and innovations. In the safety area we have forward collision alert, lane departure warning, and front park assist. All are brought to the market as segment firsts. Also, the rear bumper step may seem simple, and it is, but it's also very effective, purposeful, and practical to go along with the integrated hand-hold."