How do you reset the alarm start disable on a 1996 Cadillac Deville?

To reset the alarm system on a 1996 Cadillac DeVille, first ensure the vehicle is unlocked using the key or remote. Then, insert the key into the ignition and turn it to the "On" position without starting the engine. Press and hold the "Unlock" button on the driver's side door while simultaneously pressing the "Lock" button three times. This should disable the alarm system and reset it.