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.
38 Replies
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.
The frustrating part is how little corporate cares about this issue. Our 2025 Buick was I the shop for close to 40 days and the only thing we heard from them is that “they continue to have no updates from the dealership on the status of the car” and therefore cannot do anything to help us.
