Do I have to have a commercial license to upgrade OS?

Are the two PCM's compatible...?

Is your Silverado's PCM 512KB...?
Is your GTO's PCM 512KB or 1MB...?

Try flashing the 2002 F-car 12212156 tune into your PCM.

Pinouts might be slightly different (I haven't checked all of them...).

The GTO PCM is 1MB. The connectors are blue/green.
The Silverado PCM is 512kB. The connectors are red/blue.

Both vehicles are cable throttle.

Ah, you would be swapping PCM's...

We would have to get hold of the PCM pinout diagrams and compare them

( they are available on the internet some place, I don't remember where )

So here's what I'm understanding, I use the GTO PCM (depending on pinout), do a full pcm flash to custom os, then do a calibration only flash for the 'tune'.

Quote:

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Originally Posted by Diarrheabetes

So here's what I'm understanding, I use the GTO PCM (depending on pinout), do a full pcm flash to custom os, then do a calibration only flash for the 'tune'.

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What OS is in your PTO PCM...?
Is it listed in the LS1B COS tutorial...?
If so, then yes, correct.



( and, if the pinout is different, you can repin the connectors, this is simple to do )

Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do. Use the 02 OS 12212156 for a Silverado and start with that as your base file. If this is a swap, you can use a Camaro file too, just note the pinouts change. I *believe* the 00 and 02 Silverados have the same PCM pinout, I'd recommend double checking. Look at the DropBox for a base file, there are a few to choose from. Simply Full Flash this file into your 00 PCM and then begin the COS tutorial (replace .tun w/.ctz as Joe said).

Follow the COS upgrade tutorial from there, this OS gives you COS5 which is the best COS EFILive has for the 512kb LS1B PCMs.

Quote:

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Originally Posted by ScarabEpic22

Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do. Use the 02 OS 12212156 for a Silverado and start with that as your base file. If this is a swap, you can use a Camaro file too, just note the pinouts change. I *believe* the 00 and 02 Silverados have the same PCM pinout, I'd recommend double checking. Look at the DropBox for a base file, there are a few to choose from. Simply Full Flash this file into your 00 PCM and then begin the COS tutorial (replace .tun w/.ctz as Joe said).

Follow the COS upgrade tutorial from there, this OS gives you COS5 which is the best COS EFILive has for the 512kb LS1B PCMs.

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Awesome! I guess I just need to find a way to double check the pinouts between the two.

Quote:

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Originally Posted by ScarabEpic22

Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do.
...

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+1 I agree, it will be a distraction/tangent.

Quote:

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Originally Posted by Diarrheabetes

Awesome! I guess I just need to find a way to double check the pinouts between the two.

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A subscription to AllDataDIY may provide the info you need for a reasonable price, but I'd suggest searching around as I know you're not the first to do this so the info may be readily available!