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fuel tank capacity
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  1. Duramax Third Generation: 2006-2007.5 (LBZ & LLY)
    I know my manual and everything I've read say I have a 26 gallon tank. However, why is it I've never been able to put more than 22 gallons in it. I've had the computer saying i only had 15 miles to go and still nowhere near 26 gallons. What gives? Any one else notice this?
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