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CHERYLLYNN
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2020AT4 Enthusiast

2020AT4

Posted
Posted

Happened to me a few times within the first month of owning my AT4. I'd have no radio, nav, anything. Dealership replaced the entire module, trying to get SXM to switch my lifetime subscription over to the new radio was the worst part of the whole process. Even after it getting it replaced it still happens once in awhile. Seems to go back to working when I push the physical home button below the display (not the touch screen one, but the one that is to the right of the volume knob.)

  • 2 weeks later...
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AlohaDan
AlohaDan

Fixed???  (Maybe)   So, after multiple times in and out of the shop.... they did a global reset on the system, they replaced the USB port, etc.    This last time they replaced the "serial da

Bell040
Bell040

this happens to mines multiple times every time that I drive.  very annoying.  at first I thought the blinkers dont work when it is out, but they do blink... they just dont show you blinking from the

MrShenkir
MrShenkir

Had anyone found a fix to this? My 2019 Silverado just started this.

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Pastor Kevin New Member

Pastor Kevin

Posted
Posted (edited)

Mine is in the shop now for the second time for this issue. Dealership tries to act like they haven’t heard of it and that they can’t fix it if they can’t reproduce the issue. I don’t have a good feeling about this. 
 

Update- just picked up my truck. GM wants me to drive the truck without hooking anything up to it for twice as long. I’m a pastor and I’m dependent on my apple car play with hands free text and talk. I feel like this is a bad dream. 

Edited by Pastor Kevin
Pinnacle Enthusiast

Pinnacle

Posted
Posted
5 hours ago, Mikedfw said:

Doesn't seem like they have any idea why this is really happening.

Sent from my SM-N960U using Tapatalk
 

This is a grounding issue, this is why dealers cant pinpoint it and throw new units at it.  Its been happening since last generation.  

  • Like 1
Pastor Kevin New Member

Pastor Kevin

Posted
Posted
On 8/12/2020 at 12:12 PM, Mikedfw said:

Doesn't seem like they have any idea why this is really happening.

Sent from my SM-N960U using Tapatalk
 

I agree. It is very frustrating. GM wants me to drive mine without my apple car play engaged. Like saying I need to break the law since I can’t be hands free. Should it they know what they are doing when they build these?

  • 2 weeks later...
AlohaDan Enthusiast

AlohaDan

Posted
Posted

I. have been doing some searching online to see if this problem is documented anywhere else.  I found this YouTube video showing that the problem exists in the GMC Sierra as well... 

 

Jimmyb85 New Member

Jimmyb85

Posted
Posted

I have a 2020 Chevy 3500 it’s a diesel the issue I am having is the radio will freeze for 5 to 8 second then the screen will go black for about 20 seconds then the radio will kick on and it will say searching and after about 15 seconds it will link back up with my phone it does this multiple times a week took it to the dealership first time all they did was reset radio it did not resolve the issue the dealership is about 45 minuets from my house it did it twice on the way home I called the dealer ship for 16 days to set up another appointment I ultimately had to drive back down and make a scene to get the owner of the dealership involved since the service department refused to talk to me at which point I scheduled a second appoint to resolve the issue they updated the soft ware this did not resolve the issue at the time I am writing this my truck has been at the dealership 9 days and they are waiting for an answer on what to do about this issue dues to this being my third time to dealer they do not want to return it right away due to the fact that if and when it has the issue again and I make a forth appointment and they work on it again. At which time I can start the procedure for lemon law in the state of Delaware has anyone had this issue if so please let me know and if you have had any luck getting this issue resolved 

James411 New Member

James411

Posted
Posted

I have a 2019 Chevy Silverado and have had radio issues from about a month after i pulled off the lot in late November 2019. The radio will only display half the screen or will turn off on it's own. I am taking it back to the dealership yet again to see if they can figure out what is wrong. They have replaced the radio and wiring and still happening.  The truck also shifts very hard into lower gears.

James

radio.jpg

  • 4 weeks later...
2nazt Enthusiast

2nazt

Posted
Posted

Mine does this all the time also. I have taken it once for and they did a software update. Since then it happens more frequently and CarPlay is almost useless now   

  • Like 1
Yoda2 Enthusiast

Yoda2

Posted
Posted (edited)
11 hours ago, 2nazt said:

Mine does this all the time also. I have taken it once for and they did a software update. Since then it happens more frequently and CarPlay is almost useless now   

Guys,

This is a LONG known problem and I'm surprised you service center didn't contact GMC Factory Techs .... Updates won't help ... there is a box behind the back seat that needs to be changed.  Have your dealer contact mine in Riverhead NY.  Buick/GMC of Riverhead..... the tech's name is Kyle.. It took over 7 visits for them to finally get it diagnosed and fixed.

Edited by Yoda2
  • Thanks 1
Brian Barbieri Enthusiast

Brian Barbieri

Posted
Posted
7 hours ago, Yoda2 said:

Guys,

This is a LONG known problem and I'm surprised you service center didn't contact GMC Factory Techs .... Updates won't help ... there is a box behind the back seat that needs to be changed.  Have your dealer contact mine in Riverhead NY.  Buick/GMC of Riverhead..... the tech's name is Kyle.. It took over 7 visits for them to finally get it diagnosed and fixed.

 

 

 great info.  Any chance you still have a copy of the invoice from that visit?

  • Like 1
scooterhst New Member

scooterhst

Posted
Posted

A good news story! Had the reboot issue while 20 minutes from dealership. Of course 3 miles from the dealership the 15th reboot attempt worked.  Pulled into the dealership and did not shut off the truck. Technician was able to read the error code which then enabled dealer to order a new radio from GM. New radio has been installed for over a month and so far it seems to have solved the problem. Not sure how long error codes for the radio stay active but my advice is to not turn off the truck if possible until dealer can read it.

John Wilburn Enthusiast

John Wilburn

Posted
Posted
On 9/26/2020 at 3:10 PM, Brian Barbieri said:

 

 

 great info.  Any chance you still have a copy of the invoice from that visit?

what was the box they replaced. Did they replace the HMI unit?

AlohaDan Enthusiast

AlohaDan

Posted
Posted (edited)

Fixed???  (Maybe)

 

So, after multiple times in and out of the shop.... they did a global reset on the system, they replaced the USB port, etc.    This last time they replaced the "serial data gateway module" and fixed some terminal that had a bad connection.  So far, after a month it seems to have fixed the issue (fingers crossed).   I'm posting the invoice so that others might be able to learn something from it.  I'll update if I get a blank screen again... I have a long road trip coming up so that should be a good opportunity to test it thoroughly.  

 

UPDATE:  Well, unfortunately have to report that after 5 weeks of hoping that all is good, I had another incident of the screen going blank again.  I'm not driving much these days because I'm working from home due to COVID, otherwise it might have happened sooner. It was just a very brief outage.  Screen went black for maybe 10-15 seconds and then came back on.   It happened while I was in a turn lane and when it happened I noticed a slight hiccup in the rhythm of the clicking sound from the turn signal at the moment it went blank, which leads me to believe that it might be related to a larger electrical issue (although I have no automotive electrical experience.. just guessing).  I have just under 10K miles on the truck now.  

 

 

 

Invoice Chevy 1.jpeg

Edited by AlohaDan
fix pic
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