Cadillac Seville 1998-04

Cadillac Seville 1998-04 Key Programming


GM Part# 88956702
Bianchi Part# BB99-PT
Ilco Part# B99-PT

Chip/Transponder ID: 13 Megamos (PK3)

Key Code Series: H001-3988 or 001-1988

Metal Key: B96 or B102

***Before you start you will need to have the right key properly cut by a local locksmith so it turns the ignition switch***

Originate New Master Key
1. Insert new key into ignition cylinder and turn it to the ON (RUN) position. The security light
on the dash will illuminate and stay on for ten minutes (Use a stop watch to make sure 10 minutes pass)
2. When the security light goes out, you have one minute to start the next step. Turn the ignition
cylinder to OFF and then back to the ON (RUN) position. The security light on the dash will
illuminate and stay on for ten more minutes.
3. When the security light goes out, you have one minute to start the next step. Turn the ignition
cylinder to OFF and then back on the ON (RUN) position. The security light on the dash
will illuminate and stay on for ten more minutes.
4. After the security light has gone off the third time, the key has been programmed into the
vehicle’s computer and will operate the car. It has replaced ALL the previous electronic key
codes and is the ONLY key programmed into the vehicle’s computer.

Add Duplicate Key
1. Insert an existing key into the ignition cylinder.
2. Turn the ignition cylinder to ON (RUN) and back to OFF.
3. Remove the existing key and, within fifteen seconds, insert the new key and turn it to ON
(RUN).
4. The security light will light up for two seconds to indicate success in programming the key
into the vehicle.
If the Add Duplicate key instructions above did not work follow the variation below.
1. Insert already programmed key into ignition and START car.
2. Turn key off and remove key.
3. Insert key to be programmed and turn to ON within 15 seconds of removing the already
programmed key.
4. The security light will go off once the key has been programmed.
5. Remove key and then test.
If the vehicle doesn’t have a security light, leave the key in for 10 minutes and 30 seconds during
step 4.