Summit White 2015 GMC Sierra 1500 SLT 4WD 8-Speed Automatic with Overdrive EcoTec3 6.2L V8 8-Speed Automatic with Overdrive, 4WD, Jet Black Leather.Recent Arrival!Awards:* 2015 KBB.com Brand Image AwardsReviews:* Powerful and fuel-efficient engines; many available configurations; well-built, comfortable interior; quiet highway ride. Source: Edmunds* If you need a half-ton pickup with the most horsepower and a class-leading 12,000-pound trailer rating, the 2015 GMC Sierra full-size pickup has you covered. Bigger-than-life styling is augmented by a plush interior and a host of cutting-edge safety and communication features. Source: KBB.com