GMC 2015 GMC Sierra 1500 SLT 2015 GMC Sierra 1500 SLT SPECIFICATIONS, PRICE & IMAGES Fuel Type: Gasoline Exterior Color: Blue City MPG: 16 Interior Color: Black Highway MPG: 23 Drivetrain: RWD Transmission: Automatic Engine: 5.3L V8 16V GDI OHV Car Features Hot Car Deals! 2020 Chevrolet Traverse LS 2010 Toyota Prius II 2020 Hyundai Elantra SE 2020 Acura RDX Technology Package 2012 Ford F-450 King Ranch 2017 Acura RDX Base 2020 INFINITI QX60 Luxe 2019 Chevrolet Silverado 1500 LT Trail Boss