Ok, let me get this: so besides DBS in '05 Mn6 cars, there was also a distinct DBS with its own reflash for '06 cars Mn or A?

 

Inquiring minds want to know...

 

As a previous 05 owner with many DBS problems I must say its a pleasure to not having that many people on here that NOW know what DBS was.

 

The reflash came out late enough to take care of the many '05's and the few '06's with DBS as I recall. I don't remember a different program for each year.

 

DBS was primarily on the 05 MN6 AND MZ6 transmissions not automatics. And it was resolved with the reflash from the dealer. If you have your car tuned by an aftermarket tuner, remember that once reflashed you will lose your tune and all is back to factory setting. Then you need to get your car back to the tuner for a retune, which does not negate the reflash.

 

Early 06 auto trans cars also had a reflash because the trans and engine did not communicate well, so it left modules on that killed the battery.

 

It is both amazing and nice, as 6spdC6 notes, that DBS seems to be a distant memory or even a strange unheard phrase, these days.

During the DBS debates heyday, I think it characterized the most challenging of issues --

* intermittent,

* difficult to reproduce,

* not seen on all instances, even when inspecting a member of the population thought to be most at risk,

* confusion with other similar but distinct issues

* incredulity from others that a true problem even existed (esp those unaffected disbelieving those afflicted and even ridiculing them for not following the shut down process)

* folk remedies with some swearing success, tending to water down more scientific efforts

* slow and confusing response(s) by GM

* possible series of necessary but unknown setup conditions needed to invoke issue

* aliased a similar fault (i.e.e weak or dead battery due to other causes)

* problem not well defined, or lumped in with different issues

etc.


So clearly a change or series of changes has brought the issue to close.

Do those who were recurrent DBS suffers have 100% relief from a reflash? If so, then GM finally got the bug or issue. I'd love to read a technical description, because it would show what we were right about and what we were wrong about. IIRC, I was in the 'camp' that thought it was isolated to 2005 MN6 ( or maybe I included some 2006s?) and was likely caused by the system 'waking up' inappropriately, perhaps due to RF interference, then doing some high current drain actions, but not providing external evidence it had done so, and repeating often enough to draw down the battery.

 

Ah to reminisce!
I experimented with my own car for a month a few years back and felt that the problem was the shutdown sequence not sensing reverse and subsequently failing to shut off completely. I can still get the 'shift to reverse' warning at times if I park on a steep uphill. But no DBS for me in years now.