Hidden head unit reboot (2024 Denali Ultimate)-maybe others also

[OmniCamaro]

With the vehicle running and in park hold down the "end call" button for 15 seconds.  Head unit will hard restart. 

You can also with the vehicle off open the driver door for 2 minutes.  Not sure what this does but it was a troubleshooting step by Onstar. 

 

These were both told to me by Onstar to try and get my data and HUD speedo working.  I just wanted to share the info here.  

 

If having Onstar issues or data issues you may also try resetting the head unit in the settings menu.  Reset and clear everything out and start over.  Clear the vehicle from your phone also.

 

[redwngr]

Thanks for posting the method.

 

And did the reset correct the issues you were having? 

 

 

[OmniCamaro]

On 7/20/2024 at 4:14 PM, redwngr said:

Thanks for posting the method.

 

And did the reset correct the issues you were having? 

 

 

Only temporarily.  

There is definitely something wrong with the 2024 SW version as my 2023 worked great.  

The speedo on HUD & DIC have both gone away and GM CS has said to take it to the dealer, which is what the next step is.  I'll post an update after that visit in a few weeks.  

I will not accept anything other than it working all the time on a list price truck of$89000!!!  GM needs to rectify this ASAP!

Edited August 8, 2024 by OmniCamaro

[TexasKeith]

Curious to know if the dealer did something to help your situation. I have a new 2024 that I got in July, and the Onstar data and speed signs have been a constant issue.