Forum Discussion
2025 Buick Enclave - Ongoing OnStar / Battery Drain Issue
Hi everyone, I’m posting to see if anyone else has been dealing with the same issue. I have a 2025 Buick Enclave that I purchased brand new about nine months ago. From the start, I’ve had recurring problems with the OnStar system and a total loss of power. The vehicle has repeatedly gone dead or failed to start. The dealer told me it’s related to a defective OnStar (telematics) module that’s been draining the battery and preventing the system from going into sleep mode. My Enclave has now spent over 30 days in the shop, and we’ve had a case open with GM for weeks — but there still isn’t a confirmed fix or part available. We have been enduring these issues while our brand new Enclave sits in the shop, and we have not received answers (from Buick or the dealer) for how it will be resolved.
I wanted to share this in case other owners are experiencing similar problems or have received any updates or resolutions from GM. If anyone from Buick or GMC sees this, please reach out — I’d really like to get this resolved.
41 Replies
We have been having the same issue and dealing with it now. Waiting on roadside assistance to come jump our car 🙄🙄 this is ridiculous.
We just wanted to send you another message letting you know that we'd be glad to assist further. To get started, please send a private message to OnStar_Support by selecting the envelope at the top right of the page.
Good morning, are you with Onstar or GM?
Our team is just a private message away if you need anything.
We want you to know that we are still here to assist you. Please send us a private message to connect with us for further assistance.
Our team can only imagine how unsettling this experience with your Enclave must have been, and we would like the opportunity to look further into your case and provide our support however possible. Please send us a private message with your VIN, Account or case number to OnStar_Support so we can look into these concerns further. Just select the envelope icon at the top right of your screen to get started. We will watch for your outreach closely. By sending us a message, you consent to the information you provide being monitored and recorded by GM or those acting on GM’s behalf, subject to the GM Privacy Statement: https://www.gm.com/privacy-statement.
They like private messages so everyone else can’t see all the problems they are having with all these vehicles. I’d keep posting everywhere you can about these problems your having. Use social media to fullest extent.
We just purchased a used 2025 Buick Enclave Avenir. We too have found that our battery will not stay charged overnight. We are just day one into our purchase. The dealer has no idea when this part is available although our dealer did say that he would give us a rental car free of charge. He has no idea how long we will use the rental car. But our new purchase will remain at the dealership. We had no idea there were so many people out there with the same problem. My question is why did the dealer let us leave knowing that this car needed the module. They knew it needed one, knew they did not know when we would ever receive one and they still let us drive away! What have others done as recourse? Is there recourse? Other than a drawn out class action? We will never br made whole. This is fraud!