Gas tank capacity for a2003 Chevrolet Silverado 1500?

The gas tank capacity for a 2003 Chevrolet Silverado 1500 varies slightly depending on the configuration (cab style and bed length). It's typically either 26 gallons or 34 gallons.

To know for sure, check your owner's manual or look at the sticker inside the driver's side doorjamb. The sticker will list the vehicle's specifications, including fuel tank capacity.