GMC 2013 GMC Sierra 1500 SLE1 2013 GMC Sierra 1500 SLE1 SPECIFICATIONS, PRICE & IMAGES Fuel Type: Gasoline Exterior Color: Black City MPG: 15 Interior Color: gray Highway MPG: 21 Drivetrain: RWD Transmission: automatic 6 speed Engine: 5.3L 8 Cylinder Engine Car Features Hot Car Deals! 2015 Lexus GX 460 2019 Ford Expedition XLT 2020 Chevrolet Silverado 1500 LTZ 2019 Volkswagen Atlas 2.0T SE 2017 Genesis G80 3.8L 2007 Acura RDX 2015 Chevrolet Tahoe LTZ 2016 Ford Explorer XLT