OnStar - Turn On the Handset Hands-Free Auto Mute Feature

It is necessary to turn on the hands-free auto mute feature. If this feature is OFF and you are using the handset connected to the vehicle but undocked, the system automatically ends the call when you dock the handset. The hands-free auto mute feature, turned ON, ensures that when you dock the handset while in a call, you will be switched to hands-free operation automatically.

To turn on this feature, program the handset for HF AUTO MUTE ON, as follows:
1. On the handset, press Fcn, then menu 1.
2. Press the * key to scroll to the Phone Options menu. The handset display will show PHONE OPTIONS.
3. Press Sto.
4. Press the * key to scroll to the Call Options submenu. The handset display will show CALL OPTIONS.
5. Press Sto.
6. Press the * key to scroll to the Hang-Up for Hands-Free feature. The handset display will show HF AUTO MUTE OFF (if the feature is off).
7. If the feature is OFF, press Stop to turn the feature ON. The handset display will show HF AUTO MUTE ON.
8. Press End to exit the menu.