Adding Keys (Without SPS) - North America

NOTE:

To initiate, this procedure requires that 1 learned key be available.
A total of eight keys and transmitters in any combination may be learned to a single vehicle. Each separate key and each transmitter counts as one of the eight allowed keys.
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.
To add transmitters, repeat steps 1 - 3 with a transmitter and service key. Hold the service key securely against the transmitter for the entire time that the key is inserted into the ignition. Place the service key at the end of the transmitter so it is centered with the key blade projecting outward from the transmitter. Hold the service key on the side of the transmitter with the Chevrolet emblem to maintain full contact between the service key and transmitter.
Verify each transmitter and key is operating properly. Operate each of the keyless entry functions and use the vehicle key to start the vehicle. When verifying operation, make sure that no other transmitters or keys are near the vehicle.