2012 Gmc Acadia keyless entry remote must be programmed to your vehicle before it will work for you. Programming can only be done at an automotive locksmith shop or the dealership with the vehicle present. There are no onboard programming instructions available for 2012 Gmc Acadia. This keyless entry remote comes with brand new battery installed and is tested for functionality before sending. This Remote keyless entry comes with 4 buttons and if you look on the back of the unit, you may see some of these numbers: OUC60270 - 850K60270 - 315 Mhz . Use these numbers to confirm that your Remote keyless entry will match this product and that it will work for your vehicle.