2019 OnStar module location - TerrainForum.net: GMC Terrain Forum
 
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post #1 of 6 (permalink) Old 03-02-2020, 07:37 AM Thread Starter
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2019 OnStar module location

I am troubleshooting a Radio module error U18AF-04. One clue is that OnStar does not work and I get an occasional SD card error. Where is the OnStar module located so I can check wiring harness for issues?
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post #2 of 6 (permalink) Old 03-02-2020, 09:10 AM
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Being a '19 it should still be in the B to B warranty.

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post #3 of 6 (permalink) Old 03-02-2020, 09:31 AM
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Take it in to dealer and have them give you a loaner. I think one module is in the back and one is under the dash. I know the radio is under the dash by the glove box as i had mine just replaced because it wouldn't understand voice commands.
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post #4 of 6 (permalink) Old 03-03-2020, 12:24 PM Thread Starter
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Car has salvage title so not covered. Where is the Onstar module located?
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post #5 of 6 (permalink) Old 03-03-2020, 02:03 PM
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From the information I can get off a DVD i have for the manual it looks to be under the Radio interface in the dash.
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post #6 of 6 (permalink) Old 03-04-2020, 11:48 AM Thread Starter
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Quote:
Originally Posted by kowal_joe View Post
From the information I can get off a DVD i have for the manual it looks to be under the Radio interface in the dash.
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