About 26 gallons
How many gallons does a 1990 buick park ave gas tank hold
18 US gallons!
17 US Gallons
17.5
17
17.5
The 2001 Buick LeSabre's fuel tank holds 18.5 gallons as found on http://consumerguideauto.howstuffworks.com/2001-buick-lesabre-3.htm
The gas tank on the 2010 Buick LaCrosse holds 18.4 gal..
The gas tank on the 2010 Buick Enclave holds 22.0 gal..
The gas tank on the 2014 Buick Regal holds 18.0 gal..
The gas tank on the 2004 Buick Regal holds 17 gal..