The fuel tank filler neck is designed for a 2004 Rainier and 2002-2004 Trailblazer Envoy, replacing part numbers 15131043, 15038562, and 15110381. Made of rubber and steel with a painted finish, it has a diameter of .94 inches and a capacity of 22 gallons. This flanged filler neck measures 36.42 inches in length and fits on the rear passenger side of the vehicle, suitable for gasoline fuel type vehicles with a standard 22-gallon tank. Designed for specific vehicle models, it meets OE specifications and is a direct replacement part.