I have a 1999 Chevy blazer 4x 4. The security light is blinking and it will not start. It cranks and has fire, but no go. I've replaced the fuel pump, distributor cap rotor, crank sensor. Even tried turning key to start position to reset it. Any ideas?? Thanks in advance.
Larry

 

Passlock sensor in the steering column... Do you by chance have a key ring that has a ton of keys or weight hanging off it? People who have heavy key rings wear out ignition tumbler parts and passlock sensors due to the weight hanging off the ignition.

You can try this:
http://www.justanswer.com/uploads/JH..._procedure.pdf

But if that doesnt do it, then you most likely need to replace that sensor.

 

Can you bypass the security system? If so, how?

 

Im sure some car stereo/alarm shops would know how to do it... but why? Why not just fix it?