Question about 2005 GMC Yukon Xl Denali

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Gas tank wont' fill to specs

I recently noticed I cannot fill my gas tank beyond 25-26 gallons on my 2005 GMC Yukon XL Denali.

Anyone have this problem or know how to fix it?

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  • brett_knox Nov 17, 2008

    31 gallons

  • lesterallen May 11, 2010

    What is the capacity listed in the owner's manual?

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  • 109 Answers

Based upon my experience, I would say it's a manufacturing defect. Something in the filler or the tank itself. I've seen cases where the dealer replaced the tank and related parts when this is happening.

Posted on Nov 17, 2008

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