we had a similar problem with out 2008 4.8

we park in the garage so it's always unlocked.

one day my wife press the starter switch, nothing. voltage checks out ok. had it towed to the dealer.

I heard this from my wife second hand. they told her her key got 'removed' from the computer so they had to reprogram. we never bother trying the second key so we can't prove it's that one key.


they also told us to keep it locked/armed when parked so they computer shuts all the electronic components down to save battery.