If it's sticking down then most likely there is probably brass from the tumblers wearing making the cylinder stick. You can try lubing it or taking it apart to clean and lube it or just replace it. If you just replace it and go aftermarket then all the one's I have seen are already keyed so you would have two key's one for the ignition and one for the rest of the car. Unless you got a lock smith to code the cylinder to the correct key code.I would try cleaning and lubing it if it was my car before I replaced it. Here is how you take it out.
1. Disconnect the negative battery cable.
2. Remove the lock cylinder bezel from the steering column shroud by carefully prying with a thin bladed screwdriver.
3. Remove the shroud fasteners and remove the steering column upper and lower shroud panels.
4. Insert the key into the ignition lock cylinder and rotate to the RUN position. Then rotate the ignition cylinder back to the ACC position.
5. Depress the locking button on the side of ignition module assembly with a thin pick-type tool. Slide the lock cylinder assembly from the ignition module.
Important: The actuator blade within the ignition module housing must be in the ACC position to install the lock cylinder assembly. If rotated, replace it to the ACC position using needle nose pliers.
1. Insert the key into the ignition lock cylinder and install into the ignition module.
2. Install the steering column upper and lower shroud panels and the shroud fasteners.
3. Install the lock cylinder bezel.
4. Reconnect the negative battery cable.
Thursday, February 24th, 2011 AT 6:25 PM