"C6 from 2005-2010 navigation radio clock stops after battery disconnect
02-27-2019, 09:42 PM
#522
Instructor
Well, add me to the list. Disconnected the battery last week for 3 or 4 days to replace the A6 trans cable and the shifter lock switch in my '08. Two things that we shouldn't have to do. Reconnected yesterday and noticed no clock. I have GPS and all other functions but, no clock. Car has nav, xm, Onstar (inactive). I'll make the call and look into the FB page.
Great info here.
Thanks guys...
Great info here.
Thanks guys...
02-27-2019, 10:30 PM
#523
Lost mine today. Took it in to the foremost Chevy dealership in the bay area that works on Vettes. I have an 07 and the clock was fine driving up to the dealership. They must have noted my clock was working and due to the laundry list of work to do would need to dis-connect the battery, They actually called me to advise me that there would be a good chance that I would lose the clock and there was no fix as of yet. I found this thread and now see I am not the only one. Sure enough, they let me know it was now gone. If there was a fix, these folks would have known about it. Looks like we have to wait for a fix at this point or keep our fingers crossed this date in April works. They did let me know that some cars clocks just come back out of nowhere.
02-28-2019, 02:57 PM
#524
Melting Slicks
What I don't get is that there are people in this thread who knew about this problem before hand and still go ahead and dis-connect their battery and loose the clock. What sense does that make. Can't you buy one of those $10 gizmos with the 9 volt battery in it that keeps your settings while you are disconnecting your battery?
Last edited by Oh Boy; 02-28-2019 at 02:58 PM.
02-28-2019, 03:29 PM
#525
What I don't get is that there are people in this thread who knew about this problem before hand and still go ahead and dis-connect their battery and loose the clock. What sense does that make. Can't you buy one of those $10 gizmos with the 9 volt battery in it that keeps your settings while you are disconnecting your battery?
02-28-2019, 04:31 PM
#526
From what I understand, the 9V gizmo you reference will not keep the radio from losing the clock, it would have to be a full 12V and mirror a real battery. There are many instances where, depending on the work needing to be done, there should be NO battery voltage at all in the system.
Last edited by tshirtmeister; 02-28-2019 at 04:33 PM.
02-28-2019, 04:35 PM
#527
I still wonder why some 2005-2010 Nav aren't affected? Is there a Battery in the nav head to keep the firmware safe? Radios and More said no. We need the Sherlock Holmes of Corvettes here!
02-28-2019, 08:40 PM
#528
Melting Slicks
Here's what you don't get. Some people work on their vehicle or take it in for service that requires the battery to be disconnected. Others simply discover a dead battery and have to remove it from the car to charge or replace. YMMV.
Last edited by jimijam; 02-28-2019 at 08:41 PM.
03-01-2019, 10:04 AM
#529
Instructor
I think you might be only referring to people who live in areas where the cars are put away for months during the winter. What about TX, CA, FL, LA, MS, etc. where the cars are driven year round? The relevant question is not whether you know about the issue, then disconnect the battery which triggers the clock issue. That would be simply treating a symptom. The REAL question is WHEN will GM provide a fix for THEIR software / hardware issue that is causing all these issues.
03-01-2019, 10:23 AM
#532
Race Director
I've had my battery disconnected (05) numerous times and never had a problem with the clock even losing the correct time. For the one's who lose the clock is this something that never happened before when you had your battery disconnected and now all of a sudden it's a problem? Wouldn't that mean something had to change in the HU between the time it was ok with disconnected battery and now? What else could that be except for an internal battery that failed? I don't get it.
03-01-2019, 10:30 AM
#533
Instructor
It is not the radio memory that is a problem, all the presets remain after the battery is disconnected.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
Last edited by StingBeeZ06; 03-01-2019 at 11:35 AM.
03-01-2019, 10:35 AM
#534
Race Director
It is not the radio memory that is a problem, all the presets remain after the battery is disconnected. It seems to be affecting 07 and newer.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
Last edited by EVRose; 03-01-2019 at 11:13 AM.
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tshirtmeister (03-01-2019)
03-01-2019, 11:18 AM
#536
It is not the radio memory that is a problem, all the presets remain after the battery is disconnected. It seems to be affecting 07 and newer.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
Something in the software / firmware stopped recognizing the clock feature on or about 12-23-2018, but the clock remained operable. However, anyone who disconnected / reconnected their battery after that date, has lost their clock function. So, if your radio is in the affected group and you disconnect your battery now, you will likely lose your clock.
03-01-2019, 12:15 PM
#538
I spoke with a GM advisor 1-800-222-2020, he had heard of the issue and he suggested that OnStar needed to send a refresh to my radio. I asked him if it mattered if I had an OnStar subscription or not, he didn't know. The GM transferred sent me to OnStar, OnStar tech said it wouldn't help. Sent me back to GM tech support...they are worthless.
03-01-2019, 12:38 PM
#539
Took a drive to my local Cadillac/Chevrolet dealer & spoke to a service writer, he said there is a bulletin concerning the loss of the clock, but it is still undetermined what it is or how to fix it.
They also have a 2012 GS on the lot that had a battery go dead & he said the clock is also gone on it. That was the least of their problems, they forgot to index the window & it was partially down during a heavy rain storm here in Northern California.
They also have a 2012 GS on the lot that had a battery go dead & he said the clock is also gone on it. That was the least of their problems, they forgot to index the window & it was partially down during a heavy rain storm here in Northern California.
