Question: how to program a liftmaster g387lm keypad?
Answer: Choose a 4 Digit PIN. Determine your garage door opener ID. ...  Make notes of DIP switch locations with the following numerical value. ...  On the keypad press and hold the * and # buttons at the same time until the backlight on the. ...  On the keypad enter the 4 digit PIN you chose to open/close the garage door and then press the.