This is happening to me, also. Can't get the update installed!I just received notification of 3.5.5, (started rolling out yesterday), but my truck is having issue installing it. It has failed 3 times. I'm wondering if it is a battery voltage issue. It is cold here (at least for TX standards). This update will keep me up to date on everything except PAAK also. Don't know when they will think I'm worthy of that one.