Steering Column Repair: 98 chev p/u, antitheft, scan tool


Question
hello i have a 1998 chev desiel p/u someone tried to steel it an broke the ignition.however they coudnt get away cause it had a broken brake line. with that said i was able to start it to get it on the flatbed. but when we changed the ignition it wil not run. it runs for a sec and shuts off. not sure what the issue is.

Answer

GM Passlock Housing
Hi Shawn:

It sounds like the antitheft has kicked in.  Make sure the 3 small wires that plug into the top of the lock housing are not cut or damaged.  Also, if the housing was damaged where the lock goes in, you will need a new one.  I am enclosing a picture of that housing with the wires I am talking about for your reference.
If all of that is intact, then try reprogramming the antitheft system.
Here's how to do it without a scan tool.  It may take up to takes 30 minutes and patience to do it right (3 – 10 minute cycles)

Re-Learn Procedure
Tools Required: None
1.   Turn ON the ignition, with the engine OFF.
2.   Attempt to start the engine, then release the key to ON (vehicle will not start).
3.   Observe the SECURITY telltale; it should be flashing.  If  it is not flashing, then you need  a scan tool to repair this.  If it is flashing…proceed.
4.   After approximately 10 minutes the telltale will turn ON for 5 seconds and then OFF.
5.   Once to turns OFF, Turn the ignition cylinder to OFF, and wait 7-10 seconds .
Then:  Repeat steps 1 through 5, 2 more times for a total of 3 cycles/30 minutes
6.   After the 3rd time you turn off the ignition, wait 7-10 seconds and then start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password and should remain running.
I hope this helps.  
here is a web page with these instructions as well:
http://www.stolenandrecovered.com/howto/pass.php

Good luck
Doug