2003 Cadillac CTS Owner's Manual - Page 230

Climate Control Steering Wheel Controls There are four controls that can be programmed for use with the climate control system. The controls are located on the left spoke of the steering wheel. Audio Systems Your audio system has been designed to operate easily and to give years of listening pleasure. You will get the most enjoyment out of it if you acquaint yourself with it first. Find out what your audio system can do and how to operate all of its controls to be sure you're getting the most out of the advanced engineering that went into it. Your vehicle has a feature called Retained Accessory Power (RAP). With RAP, you can play your audio system even after the ignition is turned off. See "Retained Accessory Power" in the Index. See "Reconfigurable Steering Wheel Controls" in the Index for more information on programming these controls. 3-9