2005 Buick Terraza Owner's Manual - Page 240

Rear Seat Audio (RSA) If your vehicle has rear seat audio (RSA), this feature allows rear seat passengers to listen to and control any of the following audio sources: AM/FM tuner, front CD player, and XM™ Satellite Radio Service (if equipped). However, the rear seat passengers can only control the sources that the front seat passengers are not listening to. For example, rear seat passengers may listen to and control a CD through headphones while the driver listens to the radio through the front speakers. The rear seat passengers have control of the volume for each set of headphones. The front seat audio controls always have priority over the RSA controls. If the front seat passengers switch the source for the main radio to a remote source, the RSA will not be able to control the remote source. You can operate the RSA when the main radio is off. The DVD or auxiliary device will always be available on channel (CHA or CH1) of the wireless headphones. All other RSA sources are available on CHB or CH2 of the wireless and wired headphones. If the RSA is off, the wired headphones will provide DVD or auxiliary device audio. You will not be able to listen to XM, on CHB or CH2, if you are listening to a DVD or an auxiliary device on CHB or CH2 and vice versa. The remote control will not operate any of the RSA features. 3-110 O (Power): Press this button to turn the system on or off. RSA CHB or RSA CH2 will appear on the display when the system is on to indicate the channel to receive audio for the wireless headphones. Press this button when the system is on to silence the rear speakers. Press this button again to turn the sound back on. BAND: Press this button to switch between FM1, FM2, AM, or XM1 or XM2 (if equipped). The selected radio station will appear on the display. If the front passengers are listening to the radio, the RSA will not switch between the bands and cannot change the station.