2015 GMC Sierra Denali HD 2500 Duramax Diesel
This 2015 GMC Sierra Denali HD 2500 4WD Crew Cab has a 6.6 liter Duramax diesel with Allison transmission. I drive it from Austin to El Paso, TX (586 miles) on one tank of for real-world MPG HWY stats and highlight the truck's features and details during the road trip (without towing). This powertrain could possibly by identical to the new Oshkosh JLTV, which is set to replace the Hummer, as noted at http://truckyeah.jalopnik.com/the-hum... Read more at: http://dieselreview.net/review/full-r...

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