No tach on any year. Any you see are aftermarket.
Here's the one I put on. Can't say it's real great. It' lags behind actual rpm, and is not very easy to see.

Here's another choice:
http://twforumc.tmdhosting610.com/forums/94300/ShowPost.aspx
jb
No tach on any year. Any you see are aftermarket....some have a tachometer. Was this an add on or just some years had them? My 2006 does not have a tach. Can I put one on from another year?