2025 Buick Enclave - Ongoing OnStar / Battery Drain Issue

Question

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.

advisor_sara · Answer

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.&nbsp;

jaimes2121 · Answer

We have been having the same issue and dealing with it now. &nbsp;Waiting on roadside assistance to come jump our car 🙄🙄 this is ridiculous.

advisor_ahmed · Answer

We know how upsetting this concern with your Enclave must be. Our team would be glad to connect and learn more. Please send us a private message to OnStar_Support by selecting the envelope at the top right of the page. Please include your full contact information, VIN, mileage, and the name of your preferred dealership. 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.