2010 GMC Acadia Owner's Manual - Page 180

5-56 Instruments and Controls To erase all programmed buttons on the Universal Remote device: Universal Remote System Operation Using Universal Remote Press and hold the appropriate Universal Remote button for at least half of a second. The indicator light will come on while the signal is being transmitted. Reprogramming a Single Universal Remote Button To reprogram any of the three Universal Remote buttons, repeat the programming instructions earlier in this section, beginning with Step 2. For help or information on the Universal Home Remote System, call the customer assistance phone number under Customer Assistance Offices on page 13‑4. Erasing Universal Remote Buttons All programmed buttons should be erased when the vehicle is sold or the lease ends. 1. Press and hold down the two outside buttons until the indicator light begins to flash, after 20 seconds. 2. Release both buttons.