How do you program keyless entry remote on 2002 sts?

To program a keyless entry remote for a 2002 Cadillac STS, start by sitting in the driver's seat and closing all doors. Insert the key into the ignition and turn it from "Off" to "On" (without starting the engine) three times, ending in the "On" position. After the third turn, the locks should cycle, indicating that the vehicle is in programming mode. Press and hold the "Lock" and "Unlock" buttons on the remote simultaneously for about 15 seconds until the locks cycle again, confirming successful programming.