What is the size of a 1998 Chevy gas tank?

The fuel tank size for a 1998 Chevy varies significantly depending on the *model* of Chevy. There were many different models in 1998 (e.g., Cavalier, Malibu, Silverado, Tahoe, etc.), each with potentially different tank sizes.

To find the exact fuel tank capacity, you need to specify the exact model and body style of your 1998 Chevy. You can usually find this information on the vehicle's identification plate (often located on the driver's side doorjamb) or in the owner's manual.