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I bought a 2005 K3500 4WD a few months ago. The first few months it wasn't worth checking the mileage since we had cold weather and I had some mornings where I let it idle so I didn't have to scrape as much frost. Checked my first tank about 4 weeks ago and got 18.21 hand calculated. Not to...- RodZZilla
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- Forum: 6.6L Duramax Diesel
