I had, for the first time, a reverse hesitation (did not seem to engage)when I first backed it out of the garage after not driving it for two days. As I usually drive it daily, I haven't really noticed the problem even though I had suspected a slight hesitation before. It seems ok now after staring and moving the car.

Per the archives, it could be the dreaded GM transmission failure or somehting else. Any advice? I had it completely serviced about 13,000 miles ago at 82,000miles, I think for the first time.