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Naf
September 3rd, 2023, 09:45 PM
I read all the posts, and searched. My only issue is I have to use the truck OS as I am using a gmlan converter to operate the cluster/instrument dials.

I tried the 2009 corvette os with a manual trans, and the gmlan converter did not work.

Besides me dumping another $100 on experimenting with another OS, does any one have a correct OS that has uses the trucks gmlan but has a manual trans?
ChipsByAl
September 4th, 2023, 07:31 AM
Changing the OS does not cost anything. Make sure the new OS is compatible with the current software in the ECM.
Al
Naf
September 4th, 2023, 07:10 PM
Changing the OS does not cost anything. Make sure the new OS is compatible with the current software in the ECM.
Al

You are correct, and I forgot to mention it was done prior with Hptuners, I know rivals, but I use both platforms, and ea has its Pros and Cons. HPT charge by the os, and iIf I were to do it with EFILive, I would have to license my ecu and that is still more money.

I searched and its a common problem, I would have to use the Corvette OS but the gateway I am using doesn't have the protocol for the Vette, just the truck gmlan. So its either run the cluster and no cruise control, or have cruise control and no cluster...
Tre-Cool
September 5th, 2023, 01:38 AM
have you tried doing a segment swap rather then a full tune swap?
Naf
September 5th, 2023, 01:43 AM
How could I do that? If the OS are not similar it will not accept a calibration write.

In theory, you are sayin keep the truck file, but do a calibration write of the corvette file?
Tre-Cool
September 5th, 2023, 02:31 AM
is there a similar os number that has the required manual option is what i mean. u could then just do a segment swap of the system segment. that seems to be the bit you need to swap.
Naf
September 5th, 2023, 03:05 AM
Doesnt work, tried that first. The truck os is looking for a gmlan trans speed signal. Its not there. So it maxes out the speedo, and goes into limp mode.
Tre-Cool
September 5th, 2023, 10:58 PM
what os are you using. i'll see if i can find anything if it's not defined already in efilive.
Naf
September 5th, 2023, 11:00 PM
what os are you using. i'll see if i can find anything if it's not defined already in efilive.

Current OS is 12630501
Tre-Cool
September 5th, 2023, 11:13 PM
forgot to ask before what was the corvette os you tried too.
Naf
September 5th, 2023, 11:15 PM
12628990
Tre-Cool
September 6th, 2023, 12:06 AM
ok on the corvette os the difference between man/auto is H0162. auto is serial data, man = pulse.

I know there's a bunch more parameters defined in hpt, which i could easily bring across, but there is also a holden commodore manual tune file that im wondering would be a better base file since it doesnt use a trans-axle setup. let me know if u want me to post the file. u could just try a segment swap on the corvette os from the holden 1.
Naf
September 6th, 2023, 12:10 AM
Does the holden commodore have the same gmlan as the gm truck?

How does one do a segment swap? I know of calibration flash, and full flash, never heard of a segment swap
Tre-Cool
September 6th, 2023, 12:33 AM
i would bet that the commodore would be more compatible then the corvette changes since they used a lot of older serial comms gear for the dash clusters. where as commodore gear was all high & low speed can to modules.
24481
Naf
September 6th, 2023, 05:45 PM
i would bet that the commodore would be more compatible then the corvette changes since they used a lot of older serial comms gear for the dash clusters. where as commodore gear was all high & low speed can to modules.
24481

You are a God send.

Worked like a charm. The rpm on the dash works and the speedo is at zero when at a stand still. So its a win win.

I will let the designer for the gateway know there is an OS that will work

Thank you again
Tre-Cool
September 6th, 2023, 09:20 PM
what else does the gateway module do?
Naf
September 6th, 2023, 09:33 PM
It converts the GMLan so the Defender TDCI 2.4 gets RPM, engine light, oil light, batt light, coolant temp, and that is all.

The defender cluster/dash is semi canbus, the speedo functions from the sensor and the Transfer case diff lock also functions directly from the sensor.

Its a complicated simple device.

All I know is now I should have cruise control, and a manual transmission. Lets see how it all pans out next week,
Schwanke Engines
October 29th, 2025, 10:01 AM
So how do I do Segment Swaps or OS changes in V8 on an E38? I know how to do it in V7.5 on a GEN III LS1B PCM but not sure on an E38/ Version 8
nonnieselman
October 29th, 2025, 01:58 PM
So how do I do Segment Swaps or OS changes in V8 on an E38? I know how to do it in V7.5 on a GEN III LS1B PCM but not sure on an E38/ Version 8

Open your tune and then open your other tune in the Comparison.

Click on F3: Calibration
Then under Segment Description, Right Click on what you want to Seg Swap and Export.
Save this file to desktop or somewhere easy to find later.

Click on your Segment description you want to segment swap.
Then click Import, Find that file you saved and open it.
Schwanke Engines
October 30th, 2025, 12:57 AM
Open your tune and then open your other tune in the Comparison.

Click on F3: Calibration
Then under Segment Description, Right Click on what you want to Seg Swap and Export.
Save this file to desktop or somewhere easy to find later.

Click on your Segment description you want to segment swap.
Then click Import, Find that file you saved and open it.

How can I change the operating system?