Forum Discussion

DrewClark5's avatar
DrewClark5
New Contributor
9 months ago

OnStar Module Failure

I, like apparently 1,000's of others have had my OnStar module fail.  I took my purchased new, regularly dealer serviced 2023 GMC Yukon Denali in for a simple oil change and tire rotation as usual at...
jaimes2121's avatar
jaimes2121
New Contributor
2 months ago

I’m currently dealing with this same issue now. My 2025 Buick Enclave was purchased outright in February, and it has already been in for service twice for the exact same problem. The first time, the dealership had my vehicle for over a month. Now it’s back in for the same issue — the battery continues to drain, and they still can’t determine the cause. It’s been almost two weeks this time, and it’s incredibly frustrating to be going through this with a brand-new vehicle!!!  We are going to get lawyers involved this time!!

  • Moriartii's avatar
    Moriartii
    New Contributor II
    2 months ago

    I have a 2022 Tahoe that is on it's third OnStar module and may be headed for the fourth.

    The battery drain reminds me of a TSB I saw on my AllData subscription.  For the 2022 Tahoe the battery drain came from an OTA updates.  Resolution was to reprogram the Serial Data Gateway Module.

    I honestly think dealers don't do any diagnostic troubleshooting anymore, they just pull codes and go from there.  They don't actually think the process through and truly troubleshoot the issues.

    • jaimes2121's avatar
      jaimes2121
      New Contributor
      2 months ago

      WOW!  You are absolutely right and I am sorry you are dealing with this as well.  Very frustrating!

    • Advisor_Sara's avatar
      Advisor_Sara
      Moderator
      2 months ago

      We recognize how this entire situation with your OnStar module has been disheartening. If you would like the added support of our team again at any time, please don't hesitate to follow up with us in private messaging.