What is the fuel capacity of a 1975 Toyota Chinook camper?

a 1975 Chinook RV is based on the hilux Toyota pickup truck, they did not change the tank that came with the truck. The rated fuel capacity is 12 gallons, effectively giving you about 10 gallons before you need to find a place to get more gas.

if your RV is tuned up you should be getting about 20mpg, so this gives you between 200 to 240 mile range before you are sucking fumes.