Nowhere in the article does it mention being a joke, but searching their site turns up this list.
"Search for "april fools" returned 5 matches
SEARCH RESULTS
Obama Orders Chevrolet and Dodge Out Of NASCAR - Car News April 2009
HAPPY APRIL FOOLS' DAY! THIS IS A JOKE. LIGHTEN UP, PEOPLE.
Oldsmobile Returns! - Car News March 2008
April Fools! Toyota didn't buy the Oldsmobile name, and nobody is reviving the brand yet. But we can still hope.
2008 Ford Escort - Auto Shows April 2007
Happy April Fools' Day. Ford isn't bringing the Escort back, despite what we told you on April 1 (below).
Mixed News for British Sports Cars, Querulous "Q", and Hybrid Taxis - Car News July 2006
Next big thing-retro names, closing time, Travis Bickle, eat your heart out, no Q for you! Lotus fools, and
Pontiac Aztek Restyle? - Car News April 2001
Not that there's anything wrong with It.
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April Fool's DayI had also done a google search and several blogs are running with the story, so I don't feel too bad. This does seem like something 0Bama would pull, and who knows he might see the article and think it's a good idea.