mpg idle shake

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    Horrible MPG

    So I have a 2001 Tahoe 5.3 4x4. It had a tuff life till I bought it. It’s got 180,000 miles and holding up well. My issue is my gas mileage is horrendous. Getting between 7-9 mpg in town. Now I live in AK and it’s 10-15* daily this time of year so it gets idled a lot to warm up. In the last 2000...

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