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2018 Colorado Z71 shift pattern and noise



Have had my 2018 Colorado Z71 for about a week now. 

Seems to stay in a gear that keeps the RPM at about 2000 at any given time. This seems high a gas mileage seems to be suffering. Anyone else notice this?

Second, a few of the gears sound a little loud, that's the best way I can describe it. If  I ease off the gas it quiets down. Kind of like something is out of balance.


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