Iridium Metallic 2015 GMC Double Cab SLE 4WD 6-Speed Automatic Electronic with Overdrive Sierra 1500 EcoTec3 5.3L V8 Sierra 1500 SLE, Double Cab, EcoTec3 5.3L V8, 6-Speed Automatic Electronic with Overdrive, 4WD, Iridium Metallic, Black Cloth.Recent Arrival!16/22 City/Highway MPG Awards: * JD Power Automotive Performance, Execution and Layout (APEAL) Study * 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