The anti theft wont keep it from cranking, it shuts down fuel pressure. Next time the light is flashing, try this
GM PASS LOCK RELEARN- Ignition to "run" position, try to start and let key return to "run" position
Approx ten minutes security light will go off
Turn key "off" and wait 5 seconds
Repeat 2 more times for a total of 3 relearns.
Turn key off, then start it
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Friday, June 20th, 2008 AT 7:39 AM