I have an Overhead Door - legacy garage door opener that has the little homelink or whatever symbol on it. It has a rolling code so I know I have to push the learn button on the garage unit. For the life of me I am not able to sync my car buttons with the garage. I have read the manual for both the car and the garage several times and just can not get it to work. Has anyone out there got the rolling code sync to work? Can you write up a quick ‘For Dummies’ guide on how to do this?????