2003 Silverado OS upgrade

[John]

Hello, I am running a supercharged 408 and have been messing with the tuning I basically have it running very nice. I was planning on flashing a 2/3 bar os, but I don't see on for 2003. My question is if I can flash a different year os even though the pcm's are not the same.

Thank You
John

[GMPX]

Hello, I am running a supercharged 408 and have been messing with the tuning I basically have it running very nice. I was planning on flashing a 2/3 bar os, but I don't see on for 2003. My question is if I can flash a different year os even though the pcm's are not the same.

Thank You
John

John, 2003's will be finished very shortly if you can hang off.

Cheers,
Ross

[John]

Ross, thanks for the reply. I can wait, I think hehe..

Thank You
John

[John]

I noticed that there are 2/3 bar calibrations for 2003 for some days now , but no tune file. Just wondering if this is all I need or if I still need the tune file to upgrade?

Thanks
John

[GMPX]

They are up on the website.
http://www.efilive.com/downloads/downloads_os.html

Here is the direct link for 2003 -
http://www.efilive.com/downloads/cus...3_20050814.zip

Don't forget to read this a few times over -
http://www.efilive.com/doc/Tutorials...20Tutorial.pdf

Cheers,
Ross

[John]

I see that there are 03150001 and 03150002 tune files but no 03150003. Just wondering since there is an 03150003 in the calibrations.

Thanks
John

[GMPX]

John,

You are correct, I didn't do one for 031500, reason being I think most people went and got the column lock reflash from the dealer (who's equivilent is 031900). If you don't want to do that it's no problem.
You have a few choices.

1 - Find a stock (or tuned) file from GM O.S 12593058 to suit your truck, this is what 031900 is based on. You can then use that for your upgrade.

2 - Give me a few days (at least) and I can add 031500 to the V3 list.
I don't mind doing that, but like I said it might take a few days.

Cheers,
Ross

[John]

Ross,

If you could add 03150003 that would be awsome. I tried to look for the 03190003 and could not find it either.

Thanks,
John

[GMPX]

John,

Must be too many late nights here.
I have done 03150003 & 03190003, it was 031700 that I did not do.
I just downloaded the zip on the web site and you are right, there is no V3 O.S's.

I'll resend them to Paul now.
Keep an eye on the downloads page for an update.

Cheers.
Ross

[John]

I can imagine you guys are working your back sides off. A big thanks to all. Kick back and have some cold ones, on me. I'll keep an eye out for the update.

Thanks Again
John