Find Autozone online and using your truck make, model and year, find the ignition lock cylinder. From this page you can access their repair manual and find a brief writeup and diagram showing where to break the casting under the turn signal cam to get to the spring loaded slider that holds the lock cylinder in place. If memory serves, you are looking for a deep well in the casting located between 1 and 2 o'clock. I tapped lightly on a small pindrift to break the casting and used a small screwdriver to push the slider into the cylinder while pulling on the cylinder at the same time,and out pops the weasel. I remember taking the turn signal harness apart to get the cam out of the way. The hardest part of the deal was getting the steering lockplate reinstalled. It sits on a stiff spring that must be compressed to get the circular spring clip back in. I used a pair of small hammer handles to press on the steering lockplate and my wife slid the clip home with a screwdriver. About a 4 hour job in all, with half of it spent deciding where to break the casting.
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