If your garage door opener is a rolling code opener, follow these additional steps: 1. Find the "learn" or "train" button on the garage door opener. 2. Firmly push and release the "learn" or "train" button. 3. Within 30 seconds, return to your car and push the HomeLinkⓇ button twice, holding it down for two seconds each time. 4. If the garage door opens or closes, you're done. If not, hold down the HomeLinkⓇ button for two seconds a third time.