How do you program the garage door opener in an impala?

To program the garage door opener in a Chevrolet Impala, first, ensure the vehicle is parked and the ignition is off. Press and hold the two outer buttons on the HomeLink system until the indicator light begins to flash, then release the buttons. Next, press and hold the button on your garage door remote while simultaneously pressing the desired HomeLink button until the indicator light changes from a slow blink to a rapid blink, indicating successful programming. Finally, test the HomeLink button to ensure it operates the garage door.