THIS PROCEDURE WILL ONLY WORK FOR EARLY PRODUCTION 99 GRAND AMS. IF IT IS A LATE PRODUCTION IT MUST BE PROGRAMMED BY DEALER OF LOCKSMITH.
Obtain all remote transmitters for this vehicle.
1. Access programming connector in LH side of trunk (drivers side). You may have to pull back some trim or carpet to access the programming connector. It will have a plug on the end of it with two holes in it or ports.
2. Jump programming connector using a suitable jumper wire. Jumping the connector means to use a wire or paperclip bent in the shape of a U to make a connection between the two ports. Be sure you are making contact with the metal inside both ports.
3. System should now lock and unlock doors, activate trunk release, and sound horn to indicate successful entry into programming mode.
4. Press and hold Lock and Unlock buttons at the same time for up to 15 seconds. System should now lock and unlock doors, activate trunk release, and sound horn to indicate successful programming of remote.
5. Repeat step 4. for each additional remote including working ones.
6. To exit programming mode remove jumper wire and test all remotes.
