Adding Keys (Without SPS)

WARNING: This page is about a different car, the 2012 Buick Verano. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

To initiate, this procedure requires that 1 learned key be available.
A total of 8 keys maybe be learned to a single vehicle.
This procedure adds keys only. The procedure does not erase previously learned keys.
The keys to be learned must duplicate the mechanical cut of the current key.

With a previously learned key, turn the ignition ON.
Turn the ignition OFF 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 and key.