From what I gather , those l4 pcms are like a 411 pcm but different unlock code. And simpler definitions. So.... could in theory take a 411 type pcm and re pin the harness and run a os for a 4...

What pcm is it? And whats make them different than say a 411 pcm ? Whats makes it difficult to unlock and flash ? Are they flash based?

Hello, I am new to pcm tuning and hacking. I have several questions regarding gm pcms. I have a 1998 chevrolet s10 with a 2.2l ln2 engine . What type of pcm is this engine running with? I have...

I finally figured it out, I had a plug-in on the os part of the xdf and it would "fix" the os and it didn't work out in Pcmhammer. I have the os situation figured out and read it on my LSDROID app...

It seems these XDFs dont work for my PCM
They keep changing the OS and can't be used with the OS 12208322.
I am not using another Plug-in for Tuner-Pro.
I am goin to look into another XDF file or...

Going to have a few questions .
Will I have to take the Universal Patcher out of my Tunerpro file? Use both Pcmhammer and Tunerpro all stock?
Will I be able to use the original XDF files for OS...

So what your telling me is the original 2001 bin file ( file to be cloned) was a bad or corrupt file ?

this os 8322 xdf file

I think I figured it out, the xdf I am using 8322 doesnt work for this os or fixed checksum os .

So these are the fixed OSes for using with the xdf for the 8322? I shouldn't have any problems treating that as the 8322 exactly?

yes, I am trying to clone the 2001 computer , using the 2002 computer.

And, yes i tried, multiple times, and testing, using both the Pcmhammer cloning tool and the write os tool, also.

[08:40:25:006] Examining C:\Users\13087\Documents\02chevyguineapigun-unaltered.bin
[08:40:25:053] Validating 512k file.
[08:40:25:068] Start End Stored Needed Verdict Segment Name...

[08:23:25:778] Examining C:\Users\13087\Downloads\[COLOR="#FF0000"]2001chevroletsilverado untouched 2 - Copy checksums fixed.bin
[08:23:25:809] Validating 512k file.
[08:23:25:809] ...

So do I have to use that checksum fixed only os ? Or was it supposed to allow me to fully clone my 2001 os ect.?

Key off 30seca then all power off for x amount of seconds

So I have to reflash the os in this order: pcmhammer test flash good ( checksum fixed bin) then write os or clone , then. When done. Switch koeo off , with the pcm still perma powered ?

I did have both ( koeo and the the power on the whole time) did i not do it in order of , both key and all time on then perma power key off ? Or is there a relearn sequence for os boot?"

[04:42:19:659] PCM Hammer 020
[04:42:20:236] Thanks for using PCM Hammer.
[04:42:20:361] Device Found: OBDX Pro VT
[04:42:20:486] Device Successfully Initialized and Ready
[04:42:23:714] ...

We got a problem, I can't use my 2001 bin (8322) to alter the new pcm, and I can still use the old 2002 bin to test it, that checksum fixed bin you gave me changed the os and kept the old at the same...

OH ,thank you so much it worked flawlessly !

How do I download and use that unversal patcher ? I looked into downloading a universal patcher off github that was a maze of a ordeal.

Anybody have an idea?

here are the two files, trying to change the 02 chevy OS, to the 01 chevy OS. I want to clone the 01 chevy pcm in other words .

Do you have a patcher in mind ? It is only the os thats is different ( obviously) that pcm hammer won't change it .

I will see what I can do. I have 12.3v 2amp power supply that is a proof of concept before I commit to that harness