It started doing this a few years ago. It just required pumping the break a few times and just became a habit to do that, so I didn't think much of it. Now it has gotten much worse. The longest it has taken to get out of Park was 40 minutes. Tonight I had to leave my Tahoe at work and take a work vehicle. May be just me trying to come up with an answer, but it seems to get stuck more in the hot weather.