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INSTALLATION INSTRUCTIONS FOR PART AX-ADGM01

Testing the AX-ADGM01

• Turn the ignition on, and then turn the 

aftermarket radio on. 

• Push the OnStar button, the radio should turn 

off (radio will mute if mute wire is connected), 

you should hear OnStar. Push the OnStar cancel 

button, the radio should come back on.

Chime Volume Adjustment
1.

With car on, shut off car and leave keys in

ignition. Open the car door and leave it open. 

Chimes will be heard.

2.

Wait 10-seconds, then with a small screwdriver 

adjust the potentiometer fully counterclockwise

(all the way left), then clockwise to raise chime 

level and counterclockwise to lower the

chime level.

3.

When the volume is at the desired level, remove

the keys from the ignition. This will lock the 

chime volume at its current level.

Audio Level Adjustment
1.

Start your vehicle and turn on the radio having

audio playing.

2.

Turn your aftermarket radio’s volume up

3/4 of the way.

3.

With a small screwdriver adjust the potentiom-

eter clockwise to raise the audio level and 

counterclockwise to lower the audio level.

4.

Once at desired level your audio adjustment 

is complete.

OnStar Level Adjustment

To adjust the OnStar volume level find the 

Black/

Yellow

 wire on the 16-pin harness. Push the blue 

OnStar button, while the voice is speaking tap the 

Black/Yellow

 wire to ground. Once the volume is 

set it will stay at that volume until the 

Black/ 

Yellow

 wire is tapped to ground again. This can 

be set during installation and then left alone. If 

user adjustment is desired, the customer may 

also tap volume up or down on the steering  

wheel (if equipped) to adjust the OnStar level.

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