2006 trailblazer ext how to bypass anti theft after putting in new ignition

I found this

Ok, do the following procedure if it does not work try it again with a new key if problem still exists the ignition switch/passlock sensor needs to be replaced then the following procedure will need to be performed again.

1. Turn key into on position with engine off.
2. Bump key into start position for a second without trying to start it and leave key in on position.
3. Leave key in on position for at least 10 minutes and security light will turn off.
4. Turn key off and wait 5 seconds.
5. Repeat steps 1-4 2 more times for a total of 3 times/30 minutes
6. Vehicle should now start.

You didn't say what size engine, but if you have a coil per cylinder check the under hood fuse block check fuse #29 10 amp and if its good look at relay #60 it's the powertrain relay. To see if it clicks when the switch turns on if yes remove the relay and jumper from #30 to #87 this should power up the coils.

You could take it to a qualified shop an have it repaired right or yor could do what this guy suggests Chevy GMC Passlock II Bypass

http://www.gmforum.com/howto/1998SM/shift%20interlock%20system.pdf

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.

your anti theft device is activated,you need to lock and unlock your doors a couple times with the key fob,not the key,and then you need to put the key in the ignition and start it,if you dont have your key fob,call your car dealer to get a new one,they are programmed for each car only,you cannot bypass it.

Is because the ignition/column and theft module do not match, or maybe damaged theft system during the attempted theft of truck. You can bypass tho.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

By bypassing the factory ignition, you have cut out a VERY important part of the trucks anti theft security system that you probably didnt even know was there. These system will turn off injectors to eliminate theft. Basically, your truck knows you hotwired it and aint going anywhere. This link explains the problem, and there is a way to bypass this security system on there too. You can beat this yourself. Check out this link. http://vatspasslockpasskeysecurityhelp.yolasite.com/