Quote Originally Posted by dogparish View Post
MOMENTARY & PERMANENT IMMOBILIZER BYPASS SOLUTIONS FROM:
I'm questioning this because I just swapped engines I have a 1997 Step Side 4.3 changed it to 5.7 out of a 1999 Tahoe. I'm having the same issue, it cracks up and shuts right down. A guy I that I work with use to work for a auto alarm installation company sent this link to me.
that would only work if you tested the vehicle that to new pcm came from. Otherwise you're still just putting in the sae resistance that the key would, which is for the old pcm