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About mjcmichigan

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  • Birthday 02/09/1960
  1. I have the 2017 GMC with the Diesel 4 cylinder. Loving it. I commute with it and do the hunting fishing thing. Over the first 4700 miles my odometer says the average diesel mileage is 27.8 mpg. Highway trips its 30+, around town 22-23. Yes it holds the gear on grade, but it holds the speed and I found grades it would down shift. Sent from my iPhone using Tapatalk

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