2003 Tahoe LT gas mileage

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Schilly

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Jul 20, 2012
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Hi,
After filling up my 03 Tahoe, the gas needle drops a quarter within 30 minutes of driving. The next quarter goes fairly quick as well and then it seems to slow down for the second half of the gas tank.
Any ideas what might be broken or wrong with this?
Also, what option do i have to make the Tahoe just a little bit better on gas mileage? Any filters or parts that i can change that might help out?

thanks
 
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