2015 GMC SIERRA: The GMC Sierra 1500 received a complete redesign in 2014. For 2015, an all-new eight-speed automatic transmission has been added to its powertrain roster. Also, the Sierra 1500 receives new features engineered for serious towing, including the available NHT max trailering package, which features a 9.76-inch rear axle, heavy-duty rear springs, revised shock tuning, enhanced cooling and an integrated trailer brake controller to optimize capability and comfort when trailering. This full-size pickup offers an updated engine portfolio for increased power, torque and fuel efficiency across the board. There is a 4.3 liter V-6, a 5.3L V-8 and a 6.2L V-8, all from a shared EcoTec3 engine family. In the U.S. and Canada, the 4.3L and 5.3L engines are matched with the Hydra-Matic six-speed automatic transmission, while the 6.2L is matched with the all-new 8L90 eight-speed automatic. Premium materials, attention to detail and purposeful technology define Sierra's all-new cabin. Redesigned instrument cluster is available with a centrally located, 4.2-inch color driver information center. Sierra is offered with a 110-volt outlet, up to five USB ports, four 12-volt outlets and an SD card slot. The Crew Cab, representing more than 60 percent of retail Sierra buyers, has cabins for five or six passengers, and a choice between the current 5-foot, 8-inch box, or a new 6-ft, 6-in box. Regular cabs (2/3 passenger) continue with the 6-ft, 6-in. or 8-ft box lengths, while the extended cab (5/6 seater) come exclusively with a 6-ft, 6-in. box. For the first time on Extended Cab models, is a front-hinged rear doors with outside pull handles at the rear. A suite of active safety features help with forward collision alert and lane departure warning. Note that the Sierra All-Terrain package on extended and crew cab models wear unique styling for 2014, counting a painted grille and less chrome. The All-Terrain is available with special paint colors and the highly-praised Z71 off-road suspension.
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