Forum Discussion
Telmatic Module
To Whom it may concern, I have a 2023 (7/1/23) GMC Sierra. The telematics unit was out for approx. 5 weeks before I had a dealer appt for another issue. They said i would have to work with Onstar to...
I need to add that I believe it stopped working after the needed update by the dealer. Truck is out of warranty.... 45K miles.
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