Comment by bungie4

I think this is the first time ever I can provide at least some amount of verification to a story published on the Internet.

A family friend was a service advisor for a GM dealership in the 60's and early 70's. He told this same story to me in the late 70's.

Whether its true, or, was used to teach service advisors not to dismiss 'crazy claims I don't know. But it's been around longer than year 2000 cited in the story.

Edit: So its an urban legend. At least this one predates the Internet