Factory security

80,000 miles.

It is a Silverado SS.

Disconnected security? What exactly did you disconnect because there is no way to disable the immobilizer.

I do not know because the truck would not start sometimes until the key was on the accessory position for ten minutes. And a friend said he could disconnect it. It ran okay for a day then started blowing hot air on one side and my air conditioner on the other side. I was told to unhook battery to reset it and now it wont start. I think the factory security is on all the time.

You can try a relearn but if it works, it may only be temporary because there is likely a problem with the key sensor that would require a new ignition lock.


PASSLOCK TEN MINUTE RELEARN


AUTO LEARN
Time required, approximately ten minutes:

1. Insure that the battery is fully charged.
2. Use the scan tool in order to clear the DTCs.
3. Turn the ignition switch from the OFF position to the CRANK position attempting to start the vehicle. The vehicle will start and then stall.
4. Leave the ignition switch in the ON position while observing the security indicator.
5. When the security indicator turns off, which can take up to ten minutes, turn the ignition switch off. Wait ten seconds.
6. The BCM and the PCM will learn the new code on the next start attempt.

Will try this and let you know if it works.

Do not have a scan tool I have to take it to someone who does.

That is only to clear the codes. You can do the relearn without clearing them.

Okay.