Thank you for your reply. Were you having the same symptoms as I was?
The liftgate would open 1/4 of the way and then "bounce" open a tiny bit at a time until it was just about 1/2 to 3/4 way open, then float all the way open.
By taking apart the assembly, I determined the voltage to the motor disappeared and the relay dis-engaged, then re-engaged 3 or 4 times. When the relay disengaged, the drive mechanism was able to "freewheel" and that allowed the struts to push the lift gate open until the relay re-engaged. That is what caused the bouncing.
I have been looking for a used assembly but so far have been unsuccessful.
There was a post in this thread that mentioned it may require a "Learn Cycle" but I have been reluctant to return to the dealer and pay them another $100.