e38 unlocking corrupt ecm

[dave w]

I use EFI Live V8 to read / write to the E38.

dave w

[busta9876]

V8 will unlock the ecm with ALT Key 2, but stops when it sees corrupt SN trying to write. It reads fine. I just need to figure out what the KEY is,

[dave w]

Unfortunately, I do not have the Key.

I one had to have an E38 flashed with a GM Tech II tool, to change the OS.

dave w

[roughneck427]

You will never be able to write this ecu with EFI live. Seems someone flashed the wrong OS in it. The ecm serial is not a writable region like the LS1b controllers. If your reading it it means EFI live is identifying the seed/key combo. Tunercat should be able to flash it