How do you program the home link in a 2005 buick terraza?

To program the HomeLink system in a 2005 Buick Terraza, first, hold down the two outer HomeLink buttons until the indicator light flashes rapidly, then release them. Next, choose a HomeLink button to program, press and hold it while simultaneously pressing the remote control button of the device you want to program until the HomeLink light changes from a slow blink to a solid light. Finally, press the HomeLink button again to confirm the programming. Repeat as necessary for additional devices.