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Telematic Control Module Failure - No "Get Well Plan" from GM Corp and the CEO of GM, Mary Barra.
To the GM Executive Customer Care and Corporate Leadership and to my fellow GM product owners: I am formally escalating a serious and unresolved issue regarding a Telematics Control Module (TCM) failure on my 2025 GMC Acadia Elevation, purchased in October 2025. My authorized GMC dealership has confirmed that the vehicle’s TCM requires replacement. Based on discussions with dealership personnel and extensive owner reports, this failure appears to be systemic across multiple GM platforms and model years, not an isolated incident. Despite widespread awareness of recurring TCM failures, GM continues to: Sell vehicles equipped with these modules Market and charge customers for OnStar services that may be partially or fully non‑functional Leave dealerships without sufficient replacement modules or clear remediation guidance This raises serious concerns regarding customer safety, transparency, and corporate accountability. Key Issues Requiring Executive Review Paid Services & Disclosure Why does GM continue selling OnStar subscriptions on vehicles known to suffer TCM failures that compromise emergency, location, and monitoring services? Why are customers not clearly informed of these known risks at the point of sale? Manufacturing & Parts Strategy Are newly produced GM vehicles equipped with updated or redesigned telematics modules, or are the same failure-prone units still being installed? If improved modules exist, why has GM not prioritized distributing them to dealerships to repair affected customer vehicles? Safety & Liability Exposure What safety systems are impacted when the TCM fails—specifically emergency response, airbag crash detection, vehicle tracking, and occupant monitoring? How does GM mitigate the risk of delayed or failed emergency response in accidents involving vehicles with known TCM failures? Corporate Oversight & Trust Why has GM not issued a formal service campaign, recall, or goodwill repair initiative to address this issue? How does GM intend to preserve brand trust while allowing a known electronic safety-related failure to persist? Broader Risk Implications Given GM Defense’s role as a supplier to the U.S. Department of Defense, unresolved systemic quality issues in consumer vehicles raise legitimate concerns about component reliability, governance, and risk discipline across the enterprise. Expected Resolution I am requesting executive-level intervention to provide: A clear acknowledgment of the systemic TCM issue Confirmation of whether redesigned replacement modules exist Immediate corrective action for affected customers Reimbursement or suspension of OnStar charges during periods of non-functionality A defined remediation or “get‑well” plan communicated to dealerships and customers This issue is solvable, comparatively low-cost relative to major powertrain or structural problems, and represents an opportunity for GM leadership to demonstrate accountability and customer commitment. I respectfully request a written response from GM Executive Customer Care or Corporate Leadership outlining next steps within a reasonable timeframe. Thank you in advance for reading and responding to my posting/message.LINE OPCODE TECH TYPE HOURS
A CUSTOMER STATES MESSAGE IN DIC TO SERVICE EMERGENCY CALLING ADN LIGHT BY ONSTAR BUTTON IS RED. PO **THE PART IS NOT STOCKED LOCAL, YOU WILL BE NOTIFIED OF ITS ARRIVAL. **ORDERED PARTS WILL BE HOLD FOR 30 DAYS BEFORE THEY ARE RETURNED. PLEASE ACCEPT OUR SINCERE APOLOGY, WEBER CHEVROLET.Why is the plan renewal offer in the app not available when you go to renew?
I have a message in my app that states my plan expires in 1 day, and when I called to renew with that 30% discount, $349.30/year for OnStar One, but I was told it was unavailable to me. Why advertise that if you won't stand behind the offer?? That's such misleading advertising and a sketchy business practice.Can’t get the 3yr Onstar plan that was included with vehicle
I purchased a used 2024 Hummer EV SUV used from a GMC dealer. When I tried to activate the Onstar 3 year premium plan included with the car that is on the window sticker, they are saying since it is used it’s only 30 days. I know this is incorrect. I have read several posts of other owners having the same problem but got it resolved. I have tried Onstar many times and they keep escalating the claim and say they will call back but never do. Who at OnStar can I talk to to get this resolved?onstar telematics module
I have the same problem as everyone else... Onstar Module. I have a 2022 Trail Boss I bought in October 2024. Looking at all the defective modules and time frame to get a replacement my next step is a lawyer for some type of Class action lawsuit. GM should have had a recall on the defective hardware. Since they do not I am going to help them along! Balls in your court GM!Onstar module
How long are people waiting for their onstar module? My dealer advised me today that I need mine replaced. One of the many things I have going on is that I can’t charge on a schedule. Is that part of the module? So I can’t charge during off peak hours. Any advice would be great. Thank you.Wi-Fi issues
this is the third HD2500 that I have owned and each vehicle has had very poor wi-fi service, to the point to where I would need to turn off my wifi on my phone just to get data. We are consistently in areas where AT&T has weak signals. So, I can only assume this is the culprit. When will we have the option to choose the cellular provider that works best in out area? Has anyone else experienced similar issues?
