Z means it was made an 06 I would say 3rd gen, not 100% sure but it was made in 06.
It did the same thing for me also.. But if you just call the 1800 number they offer you get someone who can tell you.. I had to call twice, but I got to talk to someone about the serial numbercantshoot4crap said:I went to the website, and put in my serial #. Got a message that said no information available. So much for that!