Super! - so like I've been alluding to for over a month now, it appears that: 1) the more GPS syncing you do, the better the odds (of getting lucky); 2) I'll bet your NAV syncs faster now; and 3) I'll bet your date reset to January of 2001.***THERE MAY BE HOPE***
About three weeks ago the battery in my 2011 STS Platinum died and...............
This morning, left for a ballgame in St. Pete, FL and when I was on the road for about a half hour (at roughly 11:40AM), my gf yells out on I75 that the clock was working again! Hope that's the case for everyone here at some point.
Your best bet is to just set the time and leave it be. (And - DONT disconnect your battery again if at all possible!)
Sure wish I could figure out exactly which SAT(s) are are allowing this to happens - would love to get my clock and NAV working well again.....(sigh.....)