When mine was wiped last week, there was no key at all shown. Since my ECM had just come from a boneyard, I've already sent it back or I't try that. I've since gotten another one that works.

Johnboy, with the right knowledge and tools, it is probably possible to fix, but not with EFILive or a TechII. The options are pretty much a new ECM or send it to EFILive for them to remove the chip and reporgram it (I'm 95% sure that Ross and Paul can or will do that).

Quote Originally Posted by Blacky View Post
If you ever suspect the ECM has had its seed key erased please try one of two things:

1. Try checking the "Use Alt keys" check box.
or
2. Try entering a value of $FFFF for the key.

When the seed/key gets wiped (by a bug in GM's TIS) the value of the seed and key get set to Seed=$FFFF and Key=$FFFF. Since flash memory erase value is $FF.

You can tell if the seed/key has been wiped because when EFILive displays the seed (just before attempting to unlock the ECM) it will show the seed value as $FFFF.

Regards
Paul