The plant closed in July '09, tard.
Snippy like to lie in the same manner that Ryan does. But then, Ryan believes in the Randian philosophy, so nothing he does or says counts against him as long as he succeeds. The Ubbermenschen are allowed to be amoral, as long as they are successful.
CNN Fact Check: Did Ryan get Obama's GM speech right? - CNN.com
The Detroit News pointed out that Obama made no such promise in the February 13, 2008, speech, and indeed, we've seen no account suggesting that Obama did. Here is the quote at issue, according to an account kept by the Council on Foreign Relations:
"I know that General Motors received some bad news yesterday, and I know how hard your governor has fought to keep jobs in this plant. But I also know how much progress you've made -- how many hybrids and fuel-efficient vehicles you're churning out," Obama said. "And I believe that if our government is there to support you, and give you the assistance you need to re-tool and make this transition, that this plant will be here for another hundred years."
By "bad news," Obama apparently was referring to GM's February 12, 2008, announcement that it had a $38.7 billion adjusted net loss for 2007.
So, back on August 16 of this year, it does appear Ryan was wrong for saying Obama promised to keep it open.
The News and the Gazette went further, reporting that the plant halted production in December 2008, and saying that Ryan essentially was criticizing Obama for failing to save a plant that closed before Obama took office.
However, while December 2008 saw the end of the vast majority of the plant's work, the Gazette itself has reported that the plant didn't close fully until April 2009. Here's a timeline: