2009 GMC Envoy Owner's Manual - Page 241

Cleaning the Video Screen Use isopropyl or rubbing alcohol on a clean cloth and gently wipe the video screen. Do not spray directly onto the screen and do not press too hard or too long on the video screen. Rear Seat Audio (RSA) This feature allows rear seat passengers to listen to any of the sources: radio, CDs, or DVDs. However, the rear seat passengers can only control the sources that are not being listened by the front seat passengers. For example, rear seat passengers can listen to and control CDs or DVDs through the 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 is not able to control the source. The rear seat audio can be operated while the main radio is off. P (Power): Press to turn the system on or off. The rear speakers are muted when the power is turned on. u (Volume): Turn to increase or to decrease the volume. The left volume knob controls the left wired headphones and the right volume knob controls the right wired headphones. SRCE (Source): Press to select a source: radio, CD, or DVD. The inactive CD or DVD remains inside the radio for future listening. SEEK: Press to advance to the next station or track and stay there. The display shows the selection. This function is inactive if the front seat passengers are listening to the same audio source. 3-109