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Hi all, my husband used my 2015 terrain last week and accidentally left the key on (DUH!!) and had to boost it before he could bring it home. Since then, the microphone for voice prompts and hands free calling won't work (and the onstar light is off completely). When I try to place a call I can hear the person on the other end, but they can't hear me. Have reset my phone, have disconnected it and reconnected it, nothing works. I've read some things online about resetting the onstar but not sure where to find the fuse in this particular suv. Any ideas of what I can do to get things going again? Radio works fine and its weird that I can hear the person through the speaker, its just the microphone portion that doesn't work. Help please :)
 

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Check setting on the radio screen under "Personalization.
Alos, have him disconnect the negative battery cable for 30 minutes or so. This will reset the computer modules in the car and possibly remedy the microphone issue.
 
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