If the vehicle is equipped with a Bose system, the GM-51 has a built-in Bose adaptor that allows the proper
audio input gain from the aftermarket radio to the Bose amplifier. To use this feature, plug in the male
8-pin connector on the harness to the GRAY female 8-pin connector on the GM-51 module. The module
is also labeled “Bose” and “Non Bose” to avoid confusion. (see picture
below)
If the vehicle is NOT equipped with a Bose system, plug in the male 8-pin connector to the BLACK female
8-pin on the GM-51 module.
The GM-51 module has a potentiometer to adjust the chime volume. It is set at half way by default. To
adjust the volume, simply use a suitable screw driver and turn the potentiometer clockwise to increase
the volume and counter-clockwise to decrease the volume.
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Rev.041917
BOSE
Connection
Non-BOSE
Connection
Chime
Volume
Adjustment
