What is the OS ID?

[Sniffles20]

What exactly does the OS ID mean? I know it's defined as "A two-letter code that further identifies the operating system." Does that mean it is what dictates what OS's can be flashed onto an ECM? For example; the OS ID of an ECM is "AM." Does that mean any OS that shares that OS ID can be flashed onto the ECM?

[joecar]

The OS id is usually an 8 digit code, for example 12202088 or 12212156.


Post the file you have, let me have a look.

[Sniffles20]

Here is the tune. Is says the OS is 12592618 and the OS ID is AM.

[joecar]

Ah, I see.

That field does not determine what OS can be flashed.


Usually, OS's that come from a like PCM can be interchanged.

Your ECM looks like it's an E40... I'm not sure if all the E40 OS's are interchangeable, I imagine they are since E40 was only a short run of 2-3 years.

[Sniffles20]

It is a ls1B ecm. I know I bricked a different ls1B by flashing that tune onto it so I have been trying to figure out what Os's were compatible with what ECMs so I don't waste another licence.

[joecar]

That tune runs on the E40 ECM, so you should not flash it to any of tbe LS1B PCMs.

~ by phone ~

[joecar]

The LS1B PCMs are divided by 512K, 768K, 1M...

which PCM do you have and drom which year/model/vehicle...?

~ by phone ~

[Sniffles20]

The vehicle is a 05 Cadillac CTS V. I have it running fine now with that tune on a stock ls1b ecm with hardware #12586243. I don't have the hardware/service numbers on hand for the bricked ecm but looks to be a 1MB as well. What other factors do you have to watch for to prevent bricking an ecm?