30-Minute Relearn Procedure

Use this procedure after replacing any of the following components:

• The passkey III+ (PK3+) keys.
• The theft deterrent control module.
• The ECM, see important above.

Important: 

• This procedure is not available on vehicles equipped with EXPORT configured theft deterrent control modules.
• When replacing a theft deterrent control module with a GM SPO Replacement Part, insure the procedure to setup a new theft deterrent control module is performed prior to the 30-minute relearn procedure.

1. With a master passkey III+ (PK3+) key, turn ON the ignition, with the engine OFF.
2. Observe the Security telltale, after approximately 10 minutes the telltale will turn off.
3. Turn OFF the ignition, and wait 5 seconds.
4. Repeat steps 1-3 two more times for a total of 3 cycles or 30 minutes.

   Important:  The vehicle learns the key transponder information and/or passwords on the ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

5. With a master PK3+ key, start the vehicle. The vehicle has now learned the key transponder information and the ECM has now learned the fuel continue password.
6. If additional keys are required to be learned, refer to ADDING KEYS (DOMESTIC)  or ADDING KEYS (EXPORT)  .
7. With a scan tool, clear any DTCs.