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! 2018 Nissan Sentra SV 2016 Mercedes-Benz E 350 2020 Acura TLX 2020 Acura MDX 3.5LCertified 2017 Toyota Camry 2020 BMW X5 sDrive40i 2020 Toyota Camry SE 2020 Buick Encore Preferred