The Ser # will be on an Allumian Plate on teft door post . I have a 48 loadmaster , The # will Be like this . 9RLWXXXX the first # is Factory code:
Starting in 1933, GM started adding a Month of Production code to the VIN. Stovebolts now had a VIN comprised of four elements: Factory Code; Model Year and Series (Note: Chevy added the 3/4-Ton back into the lineup for the 1937 model year.); Month of Production; and Production Order for that particular plant (Starting at 1,001). Production of a new model year usually started in the fall of the preceding calendar year.
1 Flint, MI 2 Tarrytown, NY 3 St. Louis, MO 5 Kansas City, MO 6 Oakland, CA 8 Atlanta, GA 9 Norwood, OH 12 Buffalo, NY 14 Baltimore, MD 20 Los Angeles, CA 21 Janesville, WI
Example -- 21GDK10020
Factory - Code Series - Production Month - Production Order 21 - GD - K - 10020
The truck in the example is the 9,019th 1937 3/4-Ton truck built at Janesville, and it rolled off the assembly line in November, 1936.