96 Roàdmaster Estate Wagon. Ran out gas last nigh

Guage read d more than a 1/4 and less than 1/2 tank full and yet I'm on the side of the interstate AAA gets me going and I fill up at the next exit now pay attention I could only get 18.4gal back in the tank. So what am I dealing with any help will be appreciated

Wrong fuel cap and plugged vents causing collapsed tank?

You sure it actually ran dry? Could be a fuel delivery system failure.

How much fuel did AAA put in the tank for you? If they put in a few gallons, 18 at the pump seems pretty close.

also a known issue of the fuel gauge reading being inaccurate.
I had to replace the sending unit and fuel pump on the wife's wagon to get it running, when she bought the car. I measured the resistance of the new sending unit and it worked like it should. Put 5 gallons of fuel in the tank and the gauge showed properly.

AAA gave the two gal. Just enough to get me to the next exit

The wagon has a 21 gallon fuel tank, so your close to full with 2 gallons plus 18...

Here is the sales brochure: http://www.lov2xlr8.no/brochures/buick/96ro/bilder/4.jpg

http://www.lov2xlr8.no/brochures/buick/96ro/96ro.html

Had the same experience with a Fleetwood: out of gas 2000 ft from the service center on I-90.  The last quarter tank on the gauge was about 1 gallon.  I could watch it fall as I drove. Now I never let it get below half a tank.

It's your gauge.

My new plan is to keep the top half of the tank full thanks