08 Sierra Crew - Two weeks ago mine died. About two weeks before it died, I noticed a few times it would fail to unlock when I was inside. I felt it might be me as I'm quick to try and open a door as I put it in park - bad work habit. Never failed to unlock from outside with the fob until it died completely.
I've yet to take it to the dealer as I've had no time as of late. I hope to take it that way within the week.