The Chevrolet Step-Van (and its badge-engineered counterpart, the GMC Value-Van) is a multi-stop truck made by General Motors from 1940 to 1998.

In 1955, a new series of Chevrolet forward-control chassis launched, similar to the previous Dubl-Duti, available in three sizes: All models were available only with the "Loadmaster" six-cylinder engine, which was renamed the "Thriftmaster Special" in 1956.

The "Special" moniker was used to distinguish the fact that it still had a downdraft carburetor (as the Dubl-Duti vans before it had) and a positive crankcase ventilation system to prevent combustion gases from passing up into the cabin while the truck was slow-moving or stationary.

[4] (Most cars at the time relied on a draft tube to passively vent the crankcase gases to atmosphere when the vehicle was in motion, which was not feasible for the enclosed engine bay and anticipated use of the forward-control chassis for delivery vans.)

[8] Until 1958, GM only made the rolling forward-control chassis for other coachbuilders such as Boyertown, De Kalb, Dayton T. Brown, Olson, Alf-Herman, Universal, and Montpelier to fit specialized van bodies to.