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  1. L

    Poor gas mileage

    I have a 2015 Tahoe that has gone from getting 20 MPG to 16 to 17 MPG. I travel from Wichita Kansas to Cedar Rapids Iowa at the same speed (70 MPH), same route, and stop at the same gas stations each trip. I made 3 round trips and got between 20 and 21 MPG on the Highway. Took the car in for...
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