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Hi Larry, when I bought my 2020 it would get 24-24.9 on road trips.
It’s been in for service work this year, (61 day in the first 3 months) and thanks to the General it now gets 17-17.5 on the good days. Can’t seem to cure it so, I think I’ve had enough. 4 Dura-Max trucks in 13 years. I think GM has decided that I will just be OK with it. They are wrong. Your 10.9-11.6 is terrible and they should be able to help that, I would think. Good Luck, Joe. |
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