You are able to program a 2011 Gmc Terrain Transponder head key by yourself if you have one working key (or key that starts the vehicle). It will first need to be cut to match your original key at an automotive locksmith or the dealership. If you are unable to find anyone to cut the key for you, we offer a key cutting service for $29.95. Please visit this link <a href="http://www.autotransponder.com/high_security_laser_key_cut_service">Key cut service</a> for more information. Once the Transponder key is cut, you can use the printed programming instructions that we send to make the Transponder head key work for your 2011 Gmc Terrain The instructions are very easy to understand and can be performed in less than a minute. If you have lost all of your Transponder head keys for the vehicle, you will need to contact an automotive locksmith or dealership to discuss your options.