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About mjcmichigan

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    New Member
  • Birthday 02/09/1960
  1. I have the little Duramax in a Canyon. Have almost 15k on it. It’s very drivable. The tranny does behave pretty good. On a trip to Canada on the 90km/hr highways, it was taking 8% grades to make it drop to 5th. Held the speed perfectly, and no heavy lugging. I think you are right. Comes down to who is doing the tuning.
  2. 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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