ResidentAlien
Member
Hmmm. Wife was complaining about the speed sign reading issue in her 2025 CT5-V. Nothing on the instrument panel or HUD like it was a week or so ago. She is driving me nuts trying to figure out how to revive it. I did manage to find out that before anything, you need an active OnStar account to ensure its operation as somehow it's connected to OnStar. Ok, we got that. Found some other information called a soft reset that wasn't exactly for CT5, but figured I'd try it. It worked!
First, ensure you've got the latest Google Maps system updates. Ours was a recent update like, maybe 10 days or so ago. I'm thinking maybe that update mooked it up. Not sure. Also, for whatever reason you have to ensure offline map download is on or speed sign reading won't work. Obviously, in the Display settings, you need to ensure the sign reading is toggled on. Which it was.
Then do a soft reset of the infotainment system.
1. Car on, engine off.
2. Hold the "end call" button on the lower left on the steery wheel for about 20 seconds until infotainment screen goes dark. Then let go of the button.
3. System on the infotainment screen ask if you want factory reset or restart. Pick one. I picked restart.
4. After it gets done restarting the infotainment stuff, open the driver door then shut it.
5. Wait 3 minutes before restarting car.
6. Take car for a drive and check to see if it re-aquires speed signs. (If it doesn't, it may be time to hit that little blue OnStar button.)
Also, if you have just purchased the car and have yet to do the "Welcome to OnStar" deal with the OnStar rep while sitting in the car, that potentially can keep you from getting the car to read speed signs.
If you already knew this, fine. If not, now you know there's something you can try. I did a search and couldn't find anything on soft reset procedure, so I'm here to say it's free to try and it worked for me.
First, ensure you've got the latest Google Maps system updates. Ours was a recent update like, maybe 10 days or so ago. I'm thinking maybe that update mooked it up. Not sure. Also, for whatever reason you have to ensure offline map download is on or speed sign reading won't work. Obviously, in the Display settings, you need to ensure the sign reading is toggled on. Which it was.
Then do a soft reset of the infotainment system.
1. Car on, engine off.
2. Hold the "end call" button on the lower left on the steery wheel for about 20 seconds until infotainment screen goes dark. Then let go of the button.
3. System on the infotainment screen ask if you want factory reset or restart. Pick one. I picked restart.
4. After it gets done restarting the infotainment stuff, open the driver door then shut it.
5. Wait 3 minutes before restarting car.
6. Take car for a drive and check to see if it re-aquires speed signs. (If it doesn't, it may be time to hit that little blue OnStar button.)
Also, if you have just purchased the car and have yet to do the "Welcome to OnStar" deal with the OnStar rep while sitting in the car, that potentially can keep you from getting the car to read speed signs.
If you already knew this, fine. If not, now you know there's something you can try. I did a search and couldn't find anything on soft reset procedure, so I'm here to say it's free to try and it worked for me.
