2015 GMC Sierra Crew Cab SLT 4×4 6.2-liter OHV V-8, direct injection, cylinder deactivation, CVVT (420 horsepower @ 5,600 rpm; 460 lbs-ft @ 4,100 rpm) Hydra-Matic 8L90 8-speed automatic 15 city/21 highway/17 combined (EPA Rating, MPG) 16.5 mpg, mostly city driving while yelling “AMERICA!” at full trot. (Observed, MPG) Tested Options: 6.2L Ecotec3 V-8, navigation, polished exhaust tips, sunroof, spray-in bedliner. As […]
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