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AleroB888
12-02-2009, 03:16 PM
Originally Posted by Bill@HPTuners
Nope, the vin needs to match the operating system in the pcm

http://tis2web.service.gm.com/tis2web

Several come up for my VIN#. The first one is the one I actually have. Looks like someone did a little “tuning” themselves. :)


Part#) 9366314
(Calibration #) 9366308

-- Corrects cold driveability concerns including idle surge hesitation, hard start, and rough idle.

Part#) 9357034
(Calibration #) 9357008

-- Calibration corrects false low fuel indicator light on when fuel tank is not empty.


Part#) 9356704
(Calibration #) 9356706

-- Improves transmission performance in garage shifts

Part#) 9355754
(Calibration #) 9355672

-- Control module calibration
Nate's Alero
12-02-2009, 03:28 PM
uh... this is? i'm confused
WhiteV6
12-02-2009, 04:27 PM
what was the question?
AleroB888
12-02-2009, 04:38 PM
what was the question?

Somebody on HPTuners forum had asked if you could use a different VIN# in their PCM, with their original OS# (operating system).

The different OS numbers available raised more questions, for me, at least. Like were there ongoing improvements to the same year model, are they still available, and if those "corrections" were made, why doesn't my car have those original issues, etc.
99alerogirl
12-02-2009, 05:23 PM
i have all the same ones you have, but i have one before all those too..

9386584 9386577 N/A New calibration to correct loss of power when accelerating caused by false spark retard


so does this mean these are things the PCM has been tuned for or what? i still have no idea what this means.
AleroB888
12-02-2009, 05:27 PM
i have all the same ones you have, but i have one before all those too..

9386584 9386577 N/A New calibration to correct loss of power when accelerating caused by false spark retard


so does this mean these are things the PCM has been tuned for or what? i still have no idea what this means.

Apparently the OEM engineers made ongoing updates/corrections to the PCMs as needed.
99alerogirl
12-02-2009, 05:28 PM
oh so these are things my PCM has been updated with? or should have been updated with? i have a different PCM now though, so oh well. haha
jayson_waltz
12-02-2009, 05:47 PM
ok so mine lists all the ones you listed. does that mean the updates are done or if not how do you tell which ones are done?
AleroB888
12-02-2009, 06:05 PM
ok so mine lists all the ones you listed. does that mean the updates are done or if not how do you tell which ones are done?

That's what I'd like to know, too. I think the higher #'s are the most recent. Every now and then I'll see somebody post in a forum saying his car has one of those symptoms and can't find out why. Maybe this has something to do with it.
colonel6632
12-02-2009, 06:44 PM
i've only got two.

Part Number 12583772
Cal.ID# 12583786
CVN N/A
Bulletin # 1414920
Description New calibration with diagnostic enhancements for DTC P0463



Part Number 12218943
Cal.ID# 12218882
CVN N/A
Bulletin #
Description Control module calibration
TheEdgeofSanity
12-02-2009, 07:33 PM
I have 3 Changes...they're reflected in the GM service information available for my car...

P/N:12201544
Cal. ID:12201467
Description: Calibration to correct P1441 from setting on a hot restart.

P/N:9389464
Cal. ID: 9389352
Description: New calibration to correct BCM dome light issue

P/N:9382784
Cal. ID: 9382732
Description: Control module calibration

Should these mean anything to me?
AleroB888
12-02-2009, 08:38 PM
I have 3 Changes...they're reflected in the GM service information available for my car...

P/N:12201544
Cal. ID:12201467
Description: Calibration to correct P1441 from setting on a hot restart.

P/N:9389464
Cal. ID: 9389352
Description: New calibration to correct BCM dome light issue

P/N:9382784
Cal. ID: 9382732
Description: Control module calibration

Should these mean anything to me?

No, unless you experience any of those issues.

I think it is also good to scan your car, to find out which OS # is actually in it.

I picked one PCM out of a junkyard '99 Alero, and it scanned as a '98 Cutlass, iirc. Of course, that doesn't mean it was running right just before it got to the junkyard... :)
TheEdgeofSanity
12-02-2009, 11:00 PM
well, the info from the dealership says that my car's transmission was reprogrammed and now I have transmission shifting issues so any idea if that would be related to the last one I listed above?
AleroB888
12-02-2009, 11:28 PM
well, the info from the dealership says that my car's transmission was reprogrammed and now I have transmission shifting issues so any idea if that would be related to the last one I listed above?

I guess that would depend on when it was reprogrammed, i.e. did it come from the factory like that, and when the tranny problems started and what is the nature of the problems. It is certainly possible.
TheEdgeofSanity
12-03-2009, 01:22 PM
it was towed to the dealership and the service statement says that it had an injector replaced, a fuel pressure valve, and the transmission reprogramed.
AleroB888
12-03-2009, 06:33 PM
it was towed to the dealership and the service statement says that it had an injector replaced, a fuel pressure valve, and the transmission reprogramed.

In that case, I would get specific info from the dealership on what was done to the PCM, and tell them you started having issues after it was done, especially if they charged for the programming.