It's a pain but it should be located on a sticker behind the dash on the firewall. Easiest way I've found to be able to retrieve it is to use a camera phone and stick your arm up under the dash and start taking pics lol
Sent from the wild blue yonder....
My code was on the backside of the fused panel that's located in the passenger kick panel. You will have to either disconnect a few connectors or unbolt it so you can move it enough to see 2 white stickers on the back of this module. I think it was the sticker in the middle for mine but it's a five digit code that's kind of hidden with other numbers.
Least that's where it is on my 08 250