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Old 11-29-2013, 12:10 PM   #2
mhs4771
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Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
Don't know the answer, but I know the Z71 Option was not an option for the Duallies, not sure about the Z85. But I ordered the Skid Plates, Heavy Duty Towing Package (Locking Rear Diff & Integrated Brake Controller) and the 5th Wheel Wiring Package. If you're a member of one of the Duramax Forums you might post the question there.
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Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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