What is the fuel capacity of 1994 Chevy G20 conversion van?

The fuel tank capacity for a 1994 Chevy G20 conversion van varied depending on the specific configuration and whether it was a short or long wheelbase model. There's no single definitive answer. You'd need to check the owner's manual for the specific van, or look at the sticker inside the driver's side doorjamb (it often lists the fuel tank capacity). Expect it to be somewhere in the range of 20-26 gallons, but that's just an estimate.