General Motor’s method of saving tooling cost on commercial vehicles shows up in the production of these tail light assemblies. By the mid 50’s years the increase demand for turn signals, two taillights were required on the panel truck and Suburban’s. GM built them right and left, installed in the body, at the factory for the first time.
These were made so one light fit the right and left side. They were turned 180 degree and they would interchange. The red lens was also turned in the housing at 180 degrees. It got the job done with half the tooling.
Surprise! These are now produced new in pairs at Jim Carter Truck Parts and other full stocking early GM truck dealers.