I don't know how the SS is out...I thought it had a combined rating of 22. If that's true and I have a 91 s10 for example which is rated at 16 combined, couldn't I trade it in and get the 4500 per the article I attached. For light duty trucks it just says they have to be new vehicles, not new trucks.
http://www.freep.com/article/2009050...h+for+clunkers