Found this on Yahoo,
www.aws.org/mwf/attachments/38/210038/moduleone.pdf
Here it is on Duramax Diesels,
http://www.duramaxdiesels.com/forum/showthread.php?t=43871Chevy has a diesel????
I think they use Farm Code 2002 on towers, at least the one I saw used it. I think the other tower they called me about to come repair used a pirated copy of Farm Code 2002, the words of my tower buddy pretty much say it all, exact quote, "Looks like they blew weld out of a straw".