Located all 256 Algos for GM, just have to sort them progmatccally

I am getting closer, waiting on my 4X Vpw device, unfortunately the Elm can not even monitor a write as it does not go into 4X.

A couple of similar (design/price) devices may be able to do this,
Seems I may have started a race for a couple products to implement it

Not sure where to puut this, but it maybe helpful for sme using BD2 1998 Pontiac Sunfire LN2 2.2l On/off/Return coolant fan AE 01 10 10 00 00 00 00 AE 01 10 00 00 00 00 00 AE 01 00 00 00 00 00 00 MIL AE 01 80 80 00 00 00 00 AE 01 80 00 00 00 00 00 AE 01 00 00 00 00 00 00 AC relay AE 01 40 40 00 00 0...

the 4 I have done, the max was 23 hours, min was just under 8 hours. Most Keys pretty low, for example the 2 3400 pcms the one key was 115D very early, the second was 42CE, but since Seed was higher, I took a chance and started at 3000 :) The longest was a 2200 Seed was 2F DA and Key 6599 (different...

Using a 2001 Impala file I found, trying to disassemble, used motorola 68330 processor created ram FFFF0000 size(?) FFFFFFFE went to 0440 and hit C In that area I see this ROM:00000440 ; --------------------------------------------------------------------------- ROM:00000440 suba.l a6,a6 ROM:0000044...

Another Update while I test more Pcms and wait for the Hardware to be ready. Not all Pcms have Mode 09 Pid 02 to report Vin# (1999 Venture for example) So it took me a bit but have now change to 3c 01,02,03 Cleaned up some code for error traps and added Voltage report and some other details. Zip now...

No it wasnt from same vehicle type, two different Osids, first was a 2001 Impala, this was a 99 venture.

Many use the same algo, but it could be the same or could be different.

To be sure I am going to the wreckers soon to grab as many PCMs from the same vehicles as I can, hoping to find the algo.

Well, GM is good at making things different lol.

Going to set up the elm to monitor while I do some testing with TechII to capture whats going on.

Just not sure if the Elm will infact still monitor dataline with TechII connected.
Heres hoping!

This is the lastest info I have found (maybe some have different definitions of bootloaders? ) 1) you unlock the PCM 2) set the PCM into diagnostics mode 3) request upload (to ram) 4) upload the "bootloader" after uploading you send the address in ram that you uploaded it to, this tells th...

Well, I started checking another PCM last night,
Seed was 33 E2
key was 42 CE

Only took 23 hours to get, so not too bad.


If you test it out, please let me know what the OSID was listed at and what vehicle it was, if you run it long enough to get key, plz let me know that too.