Although this doesn't address the exact problem, I thought it would be informative to share my last experience with my drivers seat motor(s):
All of a sudden, my memory settings and easy out setting ceased to work, when the truck was shut off, the seat wouldn't go back. After searching through some online sites, I found that the reset procedure was similar to the auto-up & auto-down setting on the windows. If something prevents the seat from moving back when the truck is turned off (cases of beer was my issue), the memory and auto functions stop working. To resolve, make sure nothing is blocking the full back and forth movement of the seat, and while standing outside the vehicle, move the seat back and forth a few times to its full stop positions. Once you do this, the memory functions & auto settings should return.