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Your information is out of date the 2020 will keep the same L5P 6.6L duramax and the new gas version is a 6.6L v8 producing 405hp at the rear end the duramax max towing on the dually regular cab duramax is now 35,500 lbs the def fill is now next to the fuel cap engine block heater is now on the bumper drivers side
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jerry Jameson
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Thanks. We’re cross-referencing with data from Chevy.