This is what you need to bypass/defeat the GM passkey circuit. It will also change the speedo signal output from the PCM to the correct signal for the Fiero speedo. I no longer need the module for my 3.4 TDC swap. This module can be used for 3800 or the 3.4 DOHC/TDC swap, possibly others.

It cost $95.00 from WCF. I'll sell it for $50.00
here's the link for a new one.