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...
I've only had my pickup since last fall, but I never noticed the trailer light test being an option on the app. Do you have to be running and have a trailer connected for it to show up? I only ever use the app to remote start in the mornings so I've never checked it while the truck was running. Having this feature on the app would be awesome, I do use the light test pretty often.