Days before the Green One’s inaugural, GM released today the first official pictures of President Obama’s . . . hybrid limo? Small, fuel-efficient, planet-sparing limo?

Nope. “In fact, it’s based on the gigantic GMC Topkick truck platform,” reports auto-insider website Jalopnik on the new “Cadillac One.”

“President Barack Obama will ride in an all-new Cadillac Presidential Limousine,” adds the Caddy press release, “continuing a long tradition of Cadillac limousines that have served many U.S. presidents.”

Ah, change.