2008 Chevy Cobalt. I had to get a new key because the other one broke. I got a paper on how to reprogram it so the new key would start. I just found my second key. Can I reprogram that key, and if i can, can you tell me where to get it or can you give me the program to do it?
Answer:With a working key, you can add another key by performing this procedure...
•With a previously learned master key, turn ON the ignition, with the engine OFF.
•Turn OFF the ignition and remove the key.
•Within 10 seconds of turning OFF the ignition, insert the key to be learned and turn ON the ignition. The vehicle has now learned the new key.