What material was used for the custom body of the Grumman LLV?

The custom body of the Grumman LLV was made from aluminum.

Aluminum gave Grumman a lightweight material for the LLV’s large delivery compartment. Keeping the body light helped the truck carry mail efficiently while placing less demand on its S-10-derived chassis, suspension and drivetrain. The body was custom-built around the needs of postal carriers rather than shaped like a conventional pickup or van.

The material also fits the LLV’s design history. Before producing the postal truck, Grumman had worked on other lightweight delivery vehicles, including the battery-electric KurbWatt and the diesel-powered KubVan. Those projects used aluminum delivery bodies and helped influence Grumman’s approach to the LLV.

The aluminum body is separate from the underlying chassis. The truck’s mechanical foundation came from General Motors, while Grumman handled the body and final assembly. That distinction explains why the LLV can simultaneously be described as S-10-based and as a purpose-built postal vehicle. Fiberglass, stainless steel and carbon fiber were not the standard material for its custom body.