Originally Posted by cdub

From the Canadian (doubt if it's different) service manual...
STANDARD PROCEDURE - TRANSMITTER PROGRAMMING

The Remote Keyless Entry Transmitter(s) can be programmed by the customer without special tools.
PROGRAMMING PROCEDURE

Transmitter programming by the customer is done by performing the following steps:

1. Insert the key into the ignition switch.
2. Press either the lock or unlock button momentarily twice.
3. Turn the key in the ignition switch to the ON/RUN position within 30 seconds.

HTH