7-14-2011 3:40pm CST I too received a text with the same message with a different number to call back.
I called the number. a recording stated that it was the credit union center and asked that I enter my credit card number. I hung up. I too believe it is a scam
Got a text from "O BEE C.U. ALERT" informing me that "Your CAR has been DEACTIVATED" and to please contact them at this number.
This isn't the first time I've gotten messages similar to this. I think I'm going to just start reporting the number to the police. It is obviously someone trying to scam.