1991 S10 Ignition Lock Cylinder will not turn with key. Had new key made. Still, the ignition switch will not turn. It is on a 1991 Chevy S-10.

That is exactly what the level is for. It is an antitheft lock that is set when you depress it and turn and remove the key.

A common problem is the ignition cylinder and/or the ignition switch. With the buzzing of the relay, i would say all this may be related to the ignition switch. A low voltage supply to any of the circuits that the switch feeds will give strange electrical conditions. If going to replace the ignition switch, then also do the cylinder at the same time. With all things described, sure sounds like the ignition switch. P.S. The locks may be related to the ignition switch problem or not at all. With that said, would suggest looking at the BCM(body control module)It control locks, and also has alot to do with the security system. See picture at bottom of this page of corroded BCM connectors. 4- Passlock Ignition lock
cylinder removed.
Install new cylinder.Try to start- it wont or dies.Leave key on for 10-12 minutes, or until light goes out.Then turn off key for 10 seconds.Turn key to 'on' position for 5 seconds, then turn to start

1. Close the vehicle doors.

2. Turn ignition to the ON position then OFF.

3. Remove key from the ignition.

4. Press and hold the driver side door lock switch in the UNLOCK position
until step 8.

5. Insert the ignition key into the ignition lock cylinder and remove the key.
(Do not turn the ignition key in the lock cylinder)

6. Insert the ignition key into the ignition lock cylinder and remove the key.
(Do not turn the ignition key in the lock cylinder)

7. Insert the ignition key into the ignition lock cylinder.
(Do not turn the ignition key in the lock cylinder)
Leave key in the ignition cylinder.

8. Release the door lock switch. The vehicle will sound three beeps in order
to verify the Program Mode has been activated.

9. Press the LOCK and UNLOCK buttons together on the keyless remote and
hold unitl the vehicle beeps twice to verify that the keyless remote has been
successfully programmed. This may take approximately 15 seconds.

10. Perform the previous step (9) to program up to four keyless remotesm, including
any old ones.

11. Remove the ignition key to exit Program Mode.

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Someone may have tried to steal the car and damaged the lock's internal pins. Replace the entire lock with new.

groan.....gunna need a bit more info. but i'll try. What portion of the ignition was ripped out? The tumbler + switch? If so, you might need to get the car's system resent to recognize that it has a new ignition put in. Sime vehicles have a theft prevention system in place to prevent the vehicle from running if its been hot wired. Your best bet would be to replace the damaged ignition components (You did not mention if you did or not). If it still doesn't work after you have replced all of the ignition components. You can try to reset the vehicle (doesn't work on all) disconnect negative battery terminal and go back into vehicle and press down the brake pedal for about 30 seconds then reconnect battery and try it....good luck, hope this helps

try this procedure to reporgram:

1. Close all vehicle doors.

2. Insert the key into the ignition.

3. Hold down the power UNLOCK button on the driver's continue to hold down until instructed
to release in step 9.

4. Perform steps 5 through 8 in fairly rapid succession.

5. Turn the key to the ON position (as far as you can go without starting the engine).

6. Turn the ignition switch to the OFF position.

7. Turn the ignition switch to the ON position.

8. Turn the ignition switch to the OFF position.

9. Release the power unlock button on the door panel. The vehicle will lock and unlock the doors automatically.

10. Hold down the LOCK and UNLOCK buttons on the transmitter simultaneously until the vehicle locks and unlocks.
This step may take up to 30 seconds.

11. Repeat step 10 NOW for each additional transmitter (including any existing transmitters).

12. Turn the ignition switch to the ON position in order to exit the transmitter programming mode

Maybe the steering wheel lock causing this problem, try rocking the wheel left to right and back the other way, if that doesn't work the lock cylinder is defective and must be replaced.

Lock Cylinder Functional
Removal

1. NOTE: The following procedure applies to vehicles that have functional ignition switch lock cylinders (11582), lock cylinder keys are available for these vehicles or the lock cylinder key numbers are known and the proper key can be made.
   
   Disconnect battery ground cable (14301). Refer to Section 14-01 .
   

1. Turn ignition switch lock cylinder to RUN position.
   

1. Place a 3.17 mm (1/8-inch) diameter wire pin or small drift punch in hole in lower steering column shroud (3530) under ignition switch (11572). Press retaining pin while pulling out on ignition switch lock cylinder to remove it from steering column lock cylinder housing (3511).
   

Installation

1. Install ignition switch lock cylinder by turning it to RUN position. Insert ignition switch lock cylinder into steering column lock cylinder housing. Make sure ignition switch lock cylinder is fully seated and aligned in interlocking washer before turning ignition switch lock cylinder to OFF position. This will permit cylinder retaining pin to extend into steering column tube flange hole.
   

1. Rotate ignition switch lock cylinder, using lock cylinder key, to ensure correct mechanical operation in all positions.
   

1. Connect battery ground cable.
   

program transmitter code(s) as follows:
1) Confirm that all the doors are closed and the ignition key is out of the ignition cylinder.
2) Open the driver’s door. Insert the key and turn the ignition switch to ON position within 10 seconds.
3) Turn the ignition switch to OFF position within 10 seconds, remove ignition key from lock cylin-der.
4) Push and release the driver’s door switch (1) 3 times within 20 seconds.
5) Insert the ignition key and turn the ignition switch to ON position within 10 seconds.
6) Turn the ignition switch to OFF position within 10 seconds, remove ignition key from lock cylin-der.
7) Press and hold both LOCK and UNLOCK buttons (2) on the transmitter (3) for more than 5 seconds
within 20 seconds of removing the ignition key from the lock cylinder in step 6.
8) Press LOCK or UNLOCK button (2) on the transmitter (3) within 5 seconds (after step 7). All the
doors will lock/ unlock to confirm that this process has been properly done.
With this process, the transmitter has been programmed.
9) If you want to program an additional transmitter, repeat the procedure from Step 1) through Step 8).
10) Make sure that the keyless entry system properly operates by operating each transmitter.