Steering Column Repair: Ignition lock problem, chevrolet tahoe, lock cylinder

Question
2003 4WD 5.3L Chevrolet Tahoe.  The ignition cylinder will not turn at all with the key in place.  I know the key works because the bell still sound once the key is entered in the ignition.  But it will not turn at all, it is in lock and will not budge.

Answer
Hi Terry:
The lock cylinders fail quite often on these vehicles. Try this:
Insert the key into the lock and gently tap the key deeper into the lock with a small hammer. Do not hit it any harder than you would if you were hitting your own thumb...you don't want to break the key, just jar the lock to read the key. The tumblers are stuck. If that does not work, then you will need a locksmith or technician to repair or replace the lock cylinder

Good luck
Doug