GM Service Manual Online
For 1990-2009 cars only

This feature allows rear seat passengers to listen to any of the music sources: radio, cassette tapes or CDs. The rear seat passengers can only control the music sources that the front seat passengers are not listening to. For example, rear seat passengers may listen to a cassette tape or 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 override the rear seat audio controls.

Your vehicle may have one of the following:

TrailBlazer Shown, TrailBlazer EXT Similar


Object Number: 806829  Size: B3

Object Number: 947446  Size: B2
PWR / (Power): Press this button to turn the rear seat audio system on or off. The rear speakers will be muted when the power is turned on unless you have a Bose® equipped vehicle. You may operate the rear seat audio functions even when the primary radio power is off.

VOL / (Volume):  Turn the knob clockwise to increase volume and counterclockwise to decrease volume. The left volume knob controls the left headphone and the right volume knob controls the right headphone.

PROG (Program) / SRCE (Source):  Press this button to switch between playing a cassette tape or a CD and listening to the radio. The inactive tape or CD will remain safely inside the radio for future listening.

SEEK:  Press the SEEK button to seek to the next station and stay there. The display will show your selection.

To scan preset stations, press and hold the SEEK button. The radio will scan to a preset station, play for a few seconds, then go the next preset station. The display will show your selections. The SEEK button is inactive if the front radio is in use.

While listening to a cassette tape, press the SEEK button to hear the next selection on the tape. Press and hold the SEEK button to go to the other side of the tape. The SEEK button is inactive if the tape mode on the front radio is in use.

While listening to a CD, press the SEEK button to hear the next track on the CD. The SEEK button is inactive if the CD mode on the front radio or the CD changer is in use.