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2025 Blazer EV: Telematics Failure, No ETA, and No OTA Updates — What’s Going On at GM?
As an early buyer of the 2025 Chevy Blazer EV, I had high hopes. I believed in GM’s vision for the future of electric vehicles. But my ownership experience has been marred by ongoing support issues that I feel compelled to share for the benefit of other EV owners and prospective buyers. Shortly after taking delivery, I discovered that I couldn’t access Tesla’s Supercharger network—something GM advertised as a key convenience—because the required adapter wasn’t available. Even GM itself couldn’t source it for weeks. Eventually, I received one, but only after significant inconvenience and lost travel flexibility. More troubling is the issue I face today: a failed Telematics Control Module, which has disabled my OnStar system and cut off access to over-the-air (OTA) updates. That means my Blazer may not receive important software improvements or even safety-related patches unless I manually bring it into a dealership—something I was told would be handled automatically when I purchased the vehicle. There’s no ETA on the part. The dealership, sympathetic as they are, admitted that many GM parts are backordered and hard to obtain. They even encouraged me and others to reach out to GM directly—something I’ve now done repeatedly. Through it all, my Senior Executive Resolution Liaison, Amira, has been incredibly helpful. She responds promptly, remains professional, and has shown genuine concern for resolving the issue. But even she is hitting brick walls. I truly don’t know how she does her job every day without the tools she needs. Frankly, GM should be paying people like her double. I’ve tried to handle this privately and with patience, but I want to raise awareness among prospective buyers and encourage greater transparency from GM.On-Star Telmetric Module Failed
I bought my 2023 Chevy Tahoe brand new in 2022. On-star Module Failed a week ago. Dealership said my extended warranty did not cover it. Part is back-ordered with no ETA. They made me pay for the part before they'd even order it. From what I've read this is a widespread problem that chevy and on-star have known about. I very angry because the whole reason I bought this car was for the entertainment package that no longer works. From also what I've read it could be months before it comes in if it comes in at all. Something needs to be done.Onstar Module Replacement ETA?
2023 GMC Sierra 1500 Denali Carbon Pro Bought with 10,000 miles. Have had it in service multiple times. Now the onstar module is out and has been for over 3 months. Dealership said it is on backorder. I bought this truck because it had the functions I need in order to drive safely as I have some disabilities. I am paying for a truck that most of the reasons I purchased the vehicle do not function. I am very disappointed in the level of service GMC has provided to their customers. What is the solution for this issue? Do customers receive any compensation for all of the time they are waiting for a new part? This is a safety issue for customers. I would think GMC would make this a high priority and let customers know the ETA to receive a new part, etc. This isn't the only problem I have had with my vehicle and it is very frustrating and disappointing. I am paying for a product that repeatedly has to go to the dealership for service and some of the most important features so not work and it affects my driving as well as my safety.23 Sierra AT4
I believe my OnStar module is out. Strange thing though, it didn't seem like everything stopped working all at once. About a month ago, I noticed I wasn't able to start/lock/unlock the vehicle through the app, and it wasn't updating the vehicle information like gas/oil life, etc. Then it was maps and the compass. Now nothing works, including the OnStar button. I was in for a recall earlier this year that had something to do with the telematics module - does that ring a bell for anyone else? Are these issues connected?Telematic Control Module needs replacement, but backordered with no ETA?! UNACCEPTABLE
My 2024 Equinox EV 2RS (Purchased brand new in November '24, only 1,568 miles on to-date) is now in the dealership for the third time due to what was thought to be a 12v battery problem. Turns out, it was a faulty Telematic Control Module that needs replacing, and the dealership that's working on it says GM has no timetable/ETA for the part?! The amount of posts on here reflecting how frequently this is happening should make GM want to have THOUSANDS of these parts on hand for immediate deployment, not arbitrarily informing dealerships, "There's no ETA." I'm a new mom and back to work for the first time since giving birth in October, and being unable to count on a vehicle to simply work is beyond defeating.On Star module broken
I ahve a 2023 Chevy Tahoe RST and the on star module has failed. There has been no connection since 8/31/24. The dealer has said it is on backorder and no ETA when a new part will arrive. Has anyone even had their on star module replaced if having similar issue? This is very concerning and upsetting as I pay for the subscription and have also paid an annual subscription for wifi that doesn't work. The clocks in my vehicle are all off and am not getting full functionality of the vehicle I paid top dollar for. The car wouldn't start a week ago because it was sending low voltage signals to every system because of the faulty module. Luckily the dealer got it operational again but said they can't just disconnect it because that would cause too many issues. Very very frustrated here....My suburban and Yukon Onstar deactivated
I found that Onstar of my 2023 Subaru and Yukon XL deneli stopped working. I came to this community and found that so many GMC Onstars have the same problem. And the same situation has occurred from 2023 to 2025, and I guess many cars don’t use Onstar and don’t know that the communication module has stopped working. With such a large-scale same issue , shouldn’t GMC recall it quickly? What is it waiting for? Waiting for a billion dollar lawsuit? My dealer quoted me $1140 to repair it yesterday, and today they will ask the manufacturer if it would be covered by the free repair.