Used door lock.

Tested, worked.

Rubber dust bellows has deterioration.

Guessing it came from a Cadillac, see these fit other applications. Some GM cars 1977- 1993?

Instructions dated 1978.

See images.

These Cadillac parts were owned by the service manager of the Cadillac dealership (and GM automobiles) in San Francisco, around 1940’s- 80’s, from his estate, many years ago. He owned several Cadillac’s and saved hopefully usable parts that may have been replaced, perhaps when trouble shooting cars at the dealership. Have been in dry storage for years. Most items sold, but came across a few more boxes.

Confirm application.

Google says:

This item is a GM power door lock actuator, commonly used for 1977-1993 GM vehicles, including models like the Chevrolet Camaro, Pontiac Firebird, and Chevrolet Corvette.

As shown.

Bin:91