PK3 Key Reprogramming Instructions

ON-BOARD
PROGRAM 1 GENERAL MOTORS*
PK3 & “CIRCLE-PL US”
originate new master key:
1. P ut the new key into the ignition. Turn it to the ON
position. The dashboard security light will flash for
15 minutes.
2. Once the dashboard security light stops flashing,
you have five minutes to begin Step 2. Turn the
ignition OFF and then back to the ON position.
The dashboard security light will flash for 15
additional minutes.
3. Repeat of Step 2.
4. Once the dashboard security light has turned off for
the third time, the key will be able to function in the
car. It has been programmed into the car’s computer
and has replaced ALL previous electronic key codes
— the computer will not recognize any other key.
add duplicate key:
1. Put the current key into the ignition.
2. Turn the ignition ON and back to OFF.
3. Remove the current key and insert the new key, turning
it ON. You MUST do this within 15 seconds.
4. The security light will switch on for two seconds,
confirming that the key has been successfully
programmed into
the vehicle.
4
add duplicate key: (Requires at least one working key):
1) V erify that the new key has “PK3” or “+” stamped on it.
2) Insert the original, already programmed key in the
ignition and start the engine. If the engine will not
start, see your dealer for service.
3) A fter the engine has started, turn the key to off and
remove the key.
4) Insert the key to be programmed and turn it to on
within 10 seconds of removing the original key.
5) The security light will turn off once the key has
been programmed. It may not be apparent that the
security light went on due to how quickly the key is
programmed.
(If your vehicle does not have a security light (04-07
Grand Prix, Bonneville, Impala), wait 10 minutes 45
seconds to make sure the key has been programmed)
6) Repeat steps 1 through 5 if additional keys are to be
programmed.

Welcome to AF. Nicely done, plenty of mis-info on this procedure, did this with my 03 Lesabre.