I assume you mean the GCWR - Gross Combined Weight Rating.
THE GCWR is an attribute of the chassis, so you need to be searching for data on the year and chassis model (wheel base), e.g. a 19xx Chevrolet P30 (or p32).
I would be surprised if it is over 20,000 lbs, though. You will be looking for the lightest toads you can find - probably a Suzuki Vitara or Grand Vitara, Chevy Tracker, Honda Civic or CRV or Jeep CJ. If a stick shift is OK, your choices will be a bit wider.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL