Key will not turn when put in ignition switch. tumblers are broken 02 olds alegro

Unfortunately, you will not be able to do that. The key and tumbler are an intricate part of the vehicles "anti-theft system. If the ignition switch or tumbler is broken it will have to be replaced and the theft code relearned. When the key is turned in the tumbler, the switch reads the key code and sends the code to the BCM. The BCM verifies the code is correct and sends a start message to the ECM and allows the engine to start. With out that code verification, the engine will not start.

Get a nail, along the key are ignition part youll see a small acess hole it will be under wear the key goes in. Okay put the nail in the small hole. at the same time have the key in the ignition as you turn the key it will catch the igition switch releas knob. there you pull the whole key out and with it come the ignition part this is called the tumbler. Okay look at the tumbler do you see that little knob that held it in . Now for the new tumbler to be installed put the key in the new tumbler and work it in till it feels that it will slide in (at this time there will be no use for the nail).once it is in turn on the car on check its movement and if all is fien the job is complete.

pull coil wire off safely or call fire Dept.

Remove the lower steering column cover and check to see if the rod from the ign. lock and tumbler to the ignition switch is binding up. If it's ok, you're problem may be the bearing under the steering wheel being broken.

Might want to remove the tumbler, and check it for obstructions, or dirt in the grease.

One quick test for this would be :

Start the truck as normal. Check the radio, if it is off, slightly turn the key backwards towards the off position, only moving the key 1 or 2 mm. It could be the key is not returning from the start position correctly.

To check the tumbler :
Look on the bottom of the steering wheel cover. There should be 4 holes, but only 3 screws. The empty hole should be by the ignition switch.

1 Insert the ignition key and turn to the RUN position.

2 Insert a punch in the access hole of the steering column and press the release tab while pulling out the ignition switch lock cylinder.

Once you have it out, you should be able to look inside the tumbler path, to see if there are any obstructions, or grease & dirt build up.
This is also the same way to remove the key in ignition warning chime. It should be a tab on the end of the tumbler ( mine was broken, left in the tumbler path )
Pry the clip down, and push the tab off the rear of the ignition switch lock.

Putting it back is a case of pushing the same punch in the hole, insert the switch lock cylinder back in, release the punch, and cycle the key to the off position.

the ignition switch is located under the dash at the bottom of the steering column.suspect a fault in the linkage connecting tumbler to switch.

ok some where on the tumbler there will be a very small pin hole you will have to put the key in turn it forward one click then take something that will fit in the pin hole and push in and pull out on the key this should remove the tumbler then follow the directions on the new tumbler to put it in

Whoa....first, the ignition swith is not a part of the tumbler. you went in to far. replace the switch and put the brass gear on the tumbler. slide the tumbler out and install the keeper. the tumbler needs to be in the "on" position..

Do you have a tilt wheel? If so you're only half the way there. The upper actuator is broken. And you got to get into the column further. As for the trick to get the cylinder in. Don't matter if you got a tilt or fixed wheel. Go to the top side of the column. About 2/3 the way down it you'll find the Ign Switch. A rod will be coming out of the top going towards the wheel area. Push it into the switch till the inst panel lights come on. That means that the Ign switch is in the 'ON' sopition. IE all the dash panel lights come on. There is a key on the tumbler that matches to a key in the ign gear. Than just incert the tumbler into the gear and turn it to lock it in.
If you got a non-tilt wheel then it sounds like the bottom of the tumbler is broken off and is still in the gear. If so do the same as above with the Ign Switch. That will align the key so you can take the broken part out and put the new Ign tumbler in.

Place key in ign. lock n tumbler and turn to "on" position. Under the column you'll see a small hole to put a small screwdriver or rod into and press it in. While you're pressing it, pull the lock n tumbler out. Installation is the reverse of removal but without the use of the rod. Just push the lock n tumbler in the hole and turn key to lock position and pull key out.