SOURCE: ignition switch on a 2002 chevy trailblazer
under the steering column, there are three or four little holes in the plastic covering. If you look inside, one of them (the one on the right side toward the dash) there is a brass pin inside. This is the pin to release the key. As far as the key not turning, I have had the same problem. The first time I replaced the ignition switch and that solved the problem. However, this makes no sense because the ignition switch has nothing to do with the tumbler being locked. GMC thinks that my anti theft system, which is inside the ignition cylinder is the problem. By removing the ignition switch, it reset the pass lock anti-theft system and temporarily fixed the problem. So, try removing the ignition switch and then plugging it back in. If that doesn't work, your in the same boat as I am, and we may both need new ignition cylinders.
SOURCE: 2001 Chevy impala had ignition switch replaced,
Turn the key to "on" and let the light flash. It should stop flashing after about ten to twenty minutes. Once the light is on steady, turn it off, then start the car. I usually put another battery on jumper cables attached to the cars battery so it does not run down and die before the system re-arms.
SOURCE: 2005 Chevy Impala ignition switch stuck in off position
if it doesnt turn you have a worn out ignition cylinder, the only fix is to replace it, Code the ignition lock cylinder, if necessary
CAUTION:Perform the body control module (BCM) theft deterrent relearn procedure whenever you replace the ignition switch lock cylinder.
SOURCE: replacing ignition switch in 2001 chevy silverado
Not the igniton switch, its the ingition cylinder and or the housing. The switch is not part of what you are really turning. It's connected to it via gears. The common problem is the key gets worn out and the tumblers wear also. Eventualy they do not line up right and will not make the "bar" drop in the cylinder to allow it to turn from the off positon. If you have the title in your name and the key has never been rekeyed or the code has been changed you can go down to a dealership with all of the info for the truck and they can cut you a key from the vin number. You can try that first before you put a cylinder and housing in it.
Testimonial: "I really appreciate this info it makes sense and hopefully this solves the problem. it gets really annoying not being able to start the truci"
SOURCE: The ignition on my 2009 Chevy Cobolt has locked up
Normally you need to step down on the brake pedal to release the key and shifter.
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