8-Speed Automatic with Overdrive, 4WD, Cocoa/Dune Leather. 2017 Sierra 1500 SLT 8-Speed Automatic with Overdrive 4WD EcoTec3 5.3L V8 TAKE ADVANTAGE OF OUR SIZZLING SUMMER SAVINGS. What is the Shults Advantage? Shults Advantage is car buying the way it should be: fun, informative and fair. Here are our promises: FORD PASS REWARDS AVAILABLE ON CERTAIN MODELS * SHUTTLE SERVICE - NO CHARGE! * ONE MASSIVE INVENTORY! * COMPREHENSIVE FACTORY CERTIFIED SERVICE * NO HASSLE SELL OR TRADE OF ANY CAR.