When my GM passkey security system triggers (90 model Reatta), I get the
same effect...nothing happens.  I cannot turn this system off.   All I can
do is
sit there until it re-sets and try again.  I had the passkey reader
bypassed, and
that worked for a while, but apparently something has gone wrong with that
"fix"
and will have to be redone.

In my case, another "fix" would be to replace the ignition key barrel with
the
passkey contacts.

Maybe yours is something like mine...