Diesel in a 1986 Chevy van was an option:
The third generation GM van was fitted with a variety of engines over its lifetime. A 4.1L (250 CID) straight six was the base engine, this was replaced by the 4.3L V6 in 1985. The 4.3L initially used a 4bbl carburetor, this was updated to TBI fuel injection in 1987. 5.0L and 5.7L small block V8s were the mainstay engines, these were also updated to fuel injection in 1987. A 7.4-liter V8 (230–255 hp (172–190 kW), 385 lb⋅ft (522 N⋅m) at 3600 rpm) was added in 1990, exclusive to the G30. The transmission choices were a three-speed manual, three-speed automatic, four-speed manual, or 4-speed automatic, depending on the model year.
Chevrolet also offered, in 1982–1995, the Detroit Diesel V8 engine. [BBM]
Its hard to tell if all the pumps at the gas station D&F stopped offered diesel from the video as the resolution is poor. Curious if anyone is familiar with that gas station chains pumps and do we know for sure the 1986 van ran on gasoline and not diesel?