Grumman Olson started making bodies in 1946 and in 2003, Grumman Olson was bought out by Poindexter and the name changed from Grumman to Morgan Olson. Today Morgan Olson calls the body a Route Star. The Grumman Logo is often found on the front fender or behind the sliding door. The GRUMMAN name is also found on the front Grille. The MORGAN OLSON logo is sometimes found on the back of the truck above the doors. The ID tag is often inside in the center above the windshield.
The VIN number is 17 digits and appears on a label on the dash cowl extrusion on the driver's side. This number is the legal identifier for the vehicle and is the number on the vehicle registration. It can be read through the driver's side window. This number is also recorded on the Federal Certificate Label located on the driver's door post located between the quarter window and the driver's door or side window.
The 15 digit body serial number is on a plastic label 11" long and 2" wide located on the driver's door post located between the quarter window and the driver's door or side window. This label has multiple manufacturer information including the VIN and the 7 digit work order number.
Union City Body did not change their van for years. They had one body style that had two different names. The Value Van was what was put on GMC chassis' and the Step Van was what was put on Chevy chassis'. They are the same body just named differently. Union City Body also made a body called a Classic. This Union City Body Classic has a Workhorse logo on the grille and it says Workhorse on the hood. That's why so many people say, "I have a Workhorse", but in reality, only the chassis was made by Workhorse while the body was made by Union City Body Company.
Other body manufacturers include; Boyertown Body, Supreme Body, and Penn Body. Below is the best picture of a Supreme Body stepvan we have. The company is still in business but have not made walkin van bodies since the 1980's.