First drive L92 with VVT and 4L70E LOG

[Taz]

VINs


The original L92 ECM tune:

• 1GYFK63857R379845
• OS 12614088
• 2007 Escalade

TCM tune:

• VIN unknown
• this is the only TCM tune used to date

Current L76 tune:

• 3GCEK13YX7G000000
• OS 12614088
• 2007 Chev full size truck
• from Holdencrazy site
• had been suggested as a possible alternative to the originally used L92 tune - to promote communication between the ECM and TCM

Alternatively ….


The “matched” pair of 2008 L76 ECM / TCM tunes on the Holdencrazy site:

• ECM (OS 12617631) - VIN 1GTEK19Y38Z000000
• TCM (OS 24239927) - VIN 1GTEK19Y38Z000000

Not sure is these are compatible with the current ECM and TCM.


Regards,
Taz

[Sid447]

Hi Taz,

I'm unsure of quite a few of the tune files in holdencrazy. The ones you've mentioned may well be untouched factory tune files. Though from experience I've come across quite a few that aren't, so am wary of using any of them with confidence.
I do know that all of the files marked (middle east) are 100% untouched stock files. The Middle East version of the Holden Commodore (aka Chevrolet Lumina SS here) for model years 2007 and 2008 came with the 6.0 L98 V8 (similar to L76 but without DOD) and they were fitted with a 4L65E (with T42 controller).
I personally took these files from cars here, can vouch for them and know they worked fine in the stock cars. The original files I keep differ only inasmuch as the VIN numbers have been removed in the holden crazy copies.
They might be worth trying as the TCM for the OP I looked at didn't have what I thought were passenger car parameters in it.

[68problemchild]

MIddle east 12612381 2007 auto Commodore = 6.0 L98 w 4L70E
Middle east 24238857 2007 auto Commodore = tranny but not sure if its 4 speed.

1. Would these be a good starting point?
2. Will they brick my ECM with the diff operating system?
My original motor = 2007 Escalade L92.

Thanks guys!

[Taz]

Hello Sid447,

Thank you for pointing us toward some known “untouched” tunes of potential compatibility. You’ve been busy while “overseas” !!

As you can tell from reading this thread, my comfort zone is Gen III - not Gen IV. Hopefully some of our resident Gen IV experts will be able to figure out the ECM / TCM communication issue.

At this point I’m “just along for the ride” - and often learning new things as we progress.

Thanks again ……

Regards,
Taz

[gmh308]

MIddle east 12612381 2007 auto Commodore = 6.0 L98 w 4L70E
Middle east 24238857 2007 auto Commodore = tranny but not sure if its 4 speed.

1. Would these be a good starting point?
2. Will they brick my ECM with the diff operating system?
My original motor = 2007 Escalade L92.

Thanks guys!

Neither will (should) brick your ECM. They are 2007 files like the OS being replaced. They will require a full flash each.

Also these two posted by Taz should achieve similar as well.

ECM (OS 12617631) - VIN 1GTEK19Y38Z000000
TCM (OS 24239927) - VIN 1GTEK19Y38Z000000

Though VATS will be simpler on Sid's files. Alternator fix required on both.

The 12617631 will make the VIN look odd but this is easily fixed by re writing the VIN, and keep your fingers crossed that the throttle calibrations are compatible with what is in your ECM.

Trucks with the 3GCEK13YX7G000000 VIN and OS 12614088 seem to be rare as rocking horse doo doo.

Never looked deeply into but it looks like VVT is only available with A6 trans's. Possibly due simply to GM marketing decisions or the fact that the A6's have a slipping TCC which smoothens out driveline vibrations that are definately there with AFM and possibly also with VVT if there are chassis/powetrain harmonics involved.


Cheers.

[68problemchild]

Thanks guys. Neither of the truck tunes above will flash. It says they are incompatible with the operating system and wont take the flash. This applies to both the engine and tranny, full or partial flash.

Middle east holden tunes wont start.

Is it possible to have the current ECM and TCM controllers operate separately?
Or I read the turbo escalade guy used a stand alone tranny controller. Is this possible?

Ideas?

Thanks for all your patience.

[gmh308]

Thanks guys. Neither of the truck tunes above will flash. It says they are incompatible with the operating system and wont take the flash. This applies to both the engine and tranny, full or partial flash.

Middle east holden tunes wont flash.

Is it possible to have the current ECM and TCM controllers operate separately?
Or I read the turbo escalade guy used a stand alone tranny controller. Is this possible?

Ideas?

Thanks for all your patience.

No problemo. You need to do a "Full Flash"on ECM and TCM. This writes the different operating system as well as the calibration. This is the right most of the three read/write toolbar icons - Left most is read, middle is write calibration only, right is Full Flash - Though the words "Full Flash" aren't used. It says write "Operating System and Calibration".

Hope this makes sense.

[Taz]

OS Compatibility

ECM OS 12614088 - ”original” L92 and L76 tunes (both 2007).

ECM OS 12612381 - Holden L98 tune (2007).

These two OS are listed as being compatible - that is they can be flashed (full flash) into the same ECM (in this case a 2007 E38).

ECM OS 12617631 - L76 tune (2008). This tune is not in the same “column” as the other tunes in the attached *.pdf (OS Compatibility document) - but may still be compatible with your ECM - it’s just deemed to be “use at your own risk” as a precautionary measure.

Therefore, the 2007 L92, L76, and L98 tunes should all flash into your ECM. I recall when you first tried the 2007 L76 tune, you had a problem getting the “full flash” to take - and you ended up doing a “calibration only” flash.

Without a successful full flash - some of the original L92 tune will probably remain resident in the ECM - and communication issues with the T42 TCM (4L70) will continue - as the ECM is attempting to communicate with a T43 TCM (6L80).


Regards,
Taz

[68problemchild]

Thanks guys.

I will revisit and take better notes on which will flash and which simplly resulted in no start.


On the VIN issue, not sure what to change.

I do recall seeing a starter solenoid error which I believe was a quick fix.

[Taz]

Regarding your questions ….

Changing VIN:

• no changes required - making changes to the VIN is just an option when you find a tune that works (as long as the VIN itself is properly displayed)
• we had been looking at the VINs, as well as the OS, to confirm / predict compatibility

What to change:

Before abandoning the current L76 tune (OS 12614088 - 2007 truck) you have, try to get a “full” flash to work. I realize you had tried this previously, and the engine wouldn’t start. Give it a try again.

Would suggest confirming the VATS settings in the L76 tune - followed by a “full flash” of the L76 tune - then try starting the engine. If the engine won’t start - follow up the full flash of the L76 tune, with a subsequent “calibration” only flash of the same L76 tune - and try starting the engine again.

If that fails (it shouldn’t), I would then suggest moving on to the 2007 Holden tune suggested by Sid (L98 ECM OS 12612381).

Not sure what the current problem is with a successful “full flash” (OS & Calibration) - both OS 12614088 & 12612381 should be compatible with your 2007 E38 ECM.


Regards,
Taz