gm version is 42.80 which i updated from : http://www.nandtools.com/one-time-update-for-x431-diagunmastertoolgx3-x431-update-software-p-198.html
still no reply on x431 site
on a 2011 jeep cherokee, the diagun shows the correct km, but on a chrysler 300 2012 it cant read the instrument cluster at all