2015 GMC Sierra 1500 Denali 4WD Onyx Black 8-Speed Automatic with Overdrive, 4WD, Jet Black w/Leather Appointed Seat Trim.8-Speed Automatic with Overdrive EcoTec3 6.2L V8 4WDAwards:* 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.comIndy's largest selection of Buicks, GMC Trucks, Kias and Mitsubishis. Ray Skillman Auto Center in Indianapolis, IN, also serving Greenwood, IN and Plainfield, IN is proud to be an automotive leader in our area. Since opening our doors, Ray Skillman Auto Center has kept a firm commitment to our customers. We offer a wide selection of vehicles and hope to make the car buying process as quick and hassle free as possible. Conveniently located just 1/2 mile north of Greenwood Park Mall on US 31 S.