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Chevy 2500 4x4 with 6.0

2310 Views 11 Replies 9 Participants Last post by  subsea78
I know this has been asked before but I want to do it one more time. I'm fixing to pull the trigger on a 2008 Chevy 2500 4x4 with the 6.0. It has 3:73 gears and the 6spd auto. What kind of mileage can I expect out of this truck? Not worried about towing so much because I know the mileage will suck. More worried about highway, I have a 50 mile drive to work.

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The old 6.0 with 4 speed and 4.10 will easily get 14 on the highway so I would think the new 6 speed and 3.73 would do somewhat better. I know my truck runs 2500 rpm at 70 mph and still gets over 14 strictly highway. That is with the 4:10 rearend. Drop back to 65 and 15mpg is attainable.
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