a group of Pontiac dealers, unhappy that Pontiac didn’t get their own version of the El Camino, pooled their resources to build this car by melding a LeMans Safari station wagon nose with an El Camino chassis and cab.

In 1967 Gordon Theisen was the owner of Adirondack Auto Sales, a Pontiac dealership in upstate New York. Gordon sold plenty of GTO’s and Firebirds but did not have a product for customers desiring a sport truck since Pontiac did not have a truck in their lineup. As the demand for trucks steadily increased Gordon’s dealership and many others in the region urged Pontiac to build a truck to fill the demand in the market. After getting no result finally Gordon decided that in 1967 his dealership would build one to be presented to the president of the Pontiac Motor Division to show him that it could and should be done.

the pickup remained the dealership's shop truck for decades afterward, and the family pressed it into boat and trailer towing duties and it often hauled snowmobile's for the family's Ski-Doo dealership.

https://www.hemmings.com/blog/2014/06/05/hemmings-find-of-the-day-1968-pontiac-lemans-sport-truck/
https://www.hemmings.com/stories/2017/02/02/one-off-lemans-gives-glimpse-into-alternate-universe-in-which-pontiac-built-the-el-camino