Pretty much what 2013Tuxedo said. Mine did the same thing....first one was replaced under warranty but as the dealership wanted close to $2000 to replace the second one, did a little checking including buying a new motor off of Amazon. Turned out thoroughly cleaning the hinges at the carwash then a couple of days of really soaking all the pivot points with penetrating oil (day one just soaking them) and assisting the lift day two got things working smoothly again. DON'T skimp on the penetrating oil - I went through two full cans of this stuff and half a can of penetrating silicone lubricant. You really need to have the oil running off of the hinges. Do this on concrete and have some sort of container to catch the run-off. Unless your motor is truly dead (no sound, no movement) or otherwise damaged, this works really well (mine was frozen up at 140,000 miles, a third of which were winter miles in CO using mag chloride on the roads). If it worked on that, pretty sure it'll take care of yours. Be patient.....