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 Nissan Altima 2.5 SR 2018 GMC Sierra 1500 2WD Reg Cab 133.0 2019 Dodge Challenger SXT 2020 Cadillac Escalade Platinum 2020 Chevrolet Blazer 2LTCertified 2019 Audi A6 3.0T Premium Plus 2016 Chevrolet Malibu 1LT 2019 Toyota Highlander LE