clock
Race Director
Joined: Aug 2008
Posts: 14,071
Likes: 1,589
From: Edmond Oklahoma
Lots of posts on this. Did you disconnect the battery? If so what was the date?
Batteries disconnected after mid November 2018 until sometime in April 2019 had this problem. Some of the clocks reappeared about mid April but not all. Some seem to think it has something to do with the refreshing of a GPS satellite software but nobody really knows. No known fix at this time.
Batteries disconnected after mid November 2018 until sometime in April 2019 had this problem. Some of the clocks reappeared about mid April but not all. Some seem to think it has something to do with the refreshing of a GPS satellite software but nobody really knows. No known fix at this time.
Melting Slicks
Joined: Aug 2006
Posts: 2,409
Likes: 129
From: Fairview Heights IL
There's a sticky thread in C6 Tech/Performance you'll want to follow. There was a Tech Bulletin issued in February, but it doesn't offer much. The truth is GM and DENSO fumbled the ball in 2011 when the Air Force announced changes to GPS broadcast message header formats. Think of this as a Y2K-like problem. The firmware in C6 and Cadillac head units was never updated to comply with the change. As a result, they can't properly decode those headers and extract the data needed to compute time correctly. GM is "working on a solution". If you believe that, I have a bridge I want to talk to you about.
Race Director
Joined: Dec 2002
Posts: 10,447
Likes: 1,145
From: Wayne Township WI
A few members reported non-functioning clocks start working.
Claim they'd done nothing, got in one day & it worked.
Whatever happened only GM knows, and they're not really talking.
Safe to say it's software related.
Give it some time, might just rectify itself as it did w/ others.
Race Director
Joined: Aug 2008
Posts: 14,071
Likes: 1,589
From: Edmond Oklahoma
Maybe not.
A few members reported non-functioning clocks start working.
Claim they'd done nothing, got in one day & it worked.
Whatever happened only GM knows, and they're not really talking.
Safe to say it's software related.
Give it some time, might just rectify itself as it did w/ others.
A few members reported non-functioning clocks start working.
Claim they'd done nothing, got in one day & it worked.
Whatever happened only GM knows, and they're not really talking.
Safe to say it's software related.
Give it some time, might just rectify itself as it did w/ others.
.
Racer
Joined: Dec 2018
Posts: 252
Likes: 55
From: Charleston SC.
Mine went out in December, after a battery change, and came back on the first week in April. No big deal to me because I'm going to replace the head unit soon anyway. Good luck with your clock, it may just pop back on one day!
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Race Director
Joined: Dec 2002
Posts: 10,447
Likes: 1,145
From: Wayne Township WI
If you've a weak battery replace it before you get stranded, hell w/ the clock.
Had exhaust work done on an '08 Z06 Jan '19, battery disconnected.
Clock's still there so this happens w/ some, but not all.
To complicate matters some who lost their clock reported at some point regaining it.
Last edited by Landru; Jun 1, 2019 at 12:19 PM.