Forum Discussion
MyGMC Trailer Light Test
My GMC trailer light test functionality appears to have been removed or lost in the most recent update of the app - March 2025. I use this feature frequently. I called OnStar support today 3/9/2025 a...
We just re-newed our plan and cannot find the features to test trailer lights on our IOS app Onstar support had us remove and reinstall. No success the next support person now wants us to reset our radio. Very frustrated the main reason to resign for connected service was for this convenient feature.