Which vehicle is generally considered the first walk-in delivery truck?

The Pak-Age-Car is generally considered the first walk-in delivery truck. Its prototype was completed in 1925, and production began in 1926.

The concept was developed in Chicago by Oldfield and Rollston as a motorized replacement for the horse-drawn delivery wagon. Its compact body let a driver stand while working, and the open design allowed quick exits from either side—useful for frequent neighborhood deliveries.

The original vehicle used a small, 7-horsepower horizontally opposed two-cylinder Hercules engine. Its drivetrain was designed as a removable module, which the manufacturer claimed could be swapped in about 15 minutes. The truck’s name was originally styled “Pac-Kar” before becoming Pak-Age-Car.

Production continued under changing corporate owners, including Stutz and Auburn Central, until 1941. Chevrolet Step-Vans and International Metro vans came later; they are notable descendants of the same walk-in delivery-truck idea, not the first example.