T-42 stock tune for OS 24252617

[frodo84]

I need a T42 stock tune (2008 Silverado, 5.3) that uses OS 24252617. If anyone can point me in the direction of one I would appreciate it, thanks.

[nonnieselman]

Ive looked through all my stock tunes and i have every OS but that one...

[frodo84]

Ive looked through all my stock tunes and i have every OS but that one...

Thanks for trying, I have been searching and haven't found it. :bawl:

[Cougar281]

You sure that's the right year/model/OS? I was bored and looked up calibrations for every gas 2008 Silverado VIN I could find and every one from the 4.3 v6 up to the 6.0 all had the 24239927 OS.

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[frodo84]

You sure that's the right year/model/OS? I was bored and looked up calibrations for every gas 2008 Silverado VIN I could find and every one from the 4.3 v6 up to the 6.0 all had the 24239927 OS.

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You're right. The module that came with my truck (and I believe to be faulty) uses that OS. I bought a replacement (online) and when I tried to load it I got an error looking for the OS I posted. I thought maybe the new module was a different OS for the same year truck but I haven't found that OS associated with the year/model of my truck. Now I'm thinking I have the wrong module. I read the file from my old module, so now I need to find the right module (I think). Thanks very much for your reply.

[ChipsByAl]

You can refer to https://tis2web.service.gm.com/tis2web with the VIN from your vehicle and see what the correct calibrations are. Or if its a project vehicle, you can use the VIN from the ECM (if it is correct!).
Al

[In-Tech]

I don't think you can brick it. You will have to write all 4 modules though, I've never checked with efilive stuff though, sry.

[Cougar281]

You SHOULD be able to full flash the tune you read from the original TCM to the new one. I don't think the T42's have the same restrictions/risks with regards to OS compatibility that newer modules tend to have.

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[frodo84]

You SHOULD be able to full flash the tune you read from the original TCM to the new one. I don't think the T42's have the same restrictions/risks with regards to OS compatibility that newer modules tend to have.

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I'm going to try that, I hope you're right. Thanks for the replies!

[frodo84]

Okay, here is what I get when I try to full flash the new module. Am I doing something wrong here?

Executing: C:\Program Files (x86)\EFILive\V8\Config\T42_F.obj
Virtual Machine Started
Script Loaded
Script Verified
Checking Data File...
Executing: Boot Loader...
Unlocking: Trying MFG Key...
VIN: 00000000000000000
OS: 24252617
Serial: BKK011040008
Operating system mismatch between file: (24239927) and controller: (24252617).
Please: Wait...
Script exited with code $0540: Incompatible operating system.

[frodo84]

I don't think you can brick it. You will have to write all 4 modules though, I've never checked with efilive stuff though, sry.

Do you mean "full flash"?

[frodo84]

Okay, after further research here on the forum it appears I can't flash my old T-42 file to a newer module with a different OS. Can anyone offer any options here? Not sure how to find a T-42 module (new) with the older OS on it. Of course, since I have tried to flash the new module (that, when ordered was supposed to be correct for a 2008 Silverado 5.3) they won't take the module back.

[Cougar281]

Welp... It seems I was wrong about the T42's not having the same risks or restrictions regarding changing the OS. I dug out one I had laying around that came out of an 05 Cobalt and tried flashing a 2007 MY calibration into it using TIS2000 and my Tech2. Seemed to go fine until the end, where I got an error and an option to retry, same error after retrying, and now it seems to be a vegetable.

I think the best suggestion I can offer to get the right module would be to look at the 'SERV NO' on the label and look for one with the same number.

[frodo84]

You can refer to https://tis2web.service.gm.com/tis2web with the VIN from your vehicle and see what the correct calibrations are. Or if its a project vehicle, you can use the VIN from the ECM (if it is correct!).
Al

Thanks, I put in my VIN and it gives me the correct OS, which is what is in my tune file.

[frodo84]

I'm confused, this is the original module from the truck: 23996

This is the new module, which the part number matches from several sources for my truck:23997

[Cougar281]

Interesting.... So you read the tune out of your original, SERV NO 242423918052, and that calibration matches what TIS says is correct for your VIN, but the SERV NO for the new module crosses to your truck? When you entered your VIN in TIS, did it ask you for a module part number after you selected the TCM? Sometimes, such as with the LBZ/LMM Duramax, where you could have an A40, A42 or A50 TCM, you get something like this to select the module you're programming:

23998

[frodo84]

Interesting.... So you read the tune out of your original, SERV NO 242423918052, and that calibration matches what TIS says is correct for your VIN, but the SERV NO for the new module crosses to your truck? When you entered your VIN in TIS, did it ask you for a module part number after you selected the TCM? Sometimes, such as with the LBZ/LMM Duramax, where you could have an A40, A42 or A50 TCM, you get something like this to select the module you're programming:

23998

No, it gave me a pulldown for TCM, ECM, BCM, etc. but after I selected the TCM option it showed me the correct number, which matches my module. Everything I pull up on rockauto, gmparts, etc. all cross to the module I was sold.

[Cougar281]

I'm not sure what happened last time I tried to program the T42, but I was able to recover it with EFILive and its original calibration, and I was just able to flash a 2008 Silverado 5.3 VIN calibration into it with TIS2000. It's possible that the replacement TCM that you have might be able to be programmed with the proper calibration for your truck using TIS2WEB (or TIS2000 depending on when your truck was built).

How does the attached tune look compared to your original tune?


23999/

[frodo84]

This is from your tune:

Operating System 24239927 $093DE5E2
System 24240382 $813C37A9
Transmission Operation 24245713 $107A85A7
Transmission Diagnostics 24241986 $AECDB668

This is from the tune I read from my module:

Operating System 24239927 $093DE5E2
System 24240383 $9A3622C3
Transmission Operation 24245712 $3DDEE06B
Transmission Diagnostics 24241986 $AECDB668

The operating systems are the same, of course the serial #, boot block, calibration I.D. and BCC are different.

I see your point, do I have to have a TECH 2 to change the new module to suit my truck?

[Cougar281]

I'm not positive, but yes, it's possible you might need a tech 2, MDI or MDI 2 and SPS to get the new module properly programmed, unless EFILive can override the mismatch and allow the flash. Hopefully Paul or Ross will chime in.

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[cbabb]

Anyone have any luck with this? I have found myself to be in the same exact situation.

[frodo84]

cbabb,

What I have learned from this (mostly from Cougar281, who has been a great help) is that you do need a tech2, MDI or MDI2 to program the new module. Cougar281 was able to program a module that he got used and flash my tune into it. He couldn't program the one I bought because you need the vehicle present and we are a couple of states apart. If you are interested, I have found a source that will provide a module programmed to your VIN, PM me if you want to pursue that.

[Cougar281]

cbabb,

What I have learned from this (mostly from Cougar281, who has been a great help) is that you do need a tech2, MDI or MDI2 to program the new module. Cougar281 was able to program a module that he got used and flash my tune into it. He couldn't program the one I bought because you need the vehicle present and we are a couple of states apart. If you are interested, I have found a source that will provide a module programmed to your VIN, PM me if you want to pursue that.Thanks for the kind words - just to clarify, I could program the new TCM you have, just not DIRECTLY to your exact calibration for your truck using TIS2Web. The really old copy of TIS2000 that I have doesn't go too far onto the 2008 model year, and your trucks VIN wasn't present in it as its a tad too new. There may also be third party J2534 devices that would work with TIS2Web, but I can't personally confirm that.

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