I say it is a BCM related item. Seems like I seen a post over at Diesel Forums. Found the post i was thinking of. http://www.duramaxdiesels.com/forum/...ead.php?t=8875
May give some light to you. so if you do the PTO deal it looks like a BCM programming will be needed. I have to say the cruise control idle deal as far as I can say is nothing but programming and why GM charges $200 for it I don't know. I guess they think they can but if enough figure it is a few simply on off statements then it be a bigger rip off than Windows OS.

Brian