Approximately 25...
The 2001 Buick LeSabre's fuel tank holds 18.5 gallons as found on http://consumerguideauto.howstuffworks.com/2001-buick-lesabre-3.htm
18 gallons.
18 gallons
17
18 US gallons!
18.5 US gallons
The fuel tank capacity is 68 liters/18 Gallons.
I think it is about 18 and a half gallons, I have a 2001.
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