From the sounds of it you have a truck with tilt steering wheel. There is an actuator that goes from the key cylinder to the rod that travels along the column to the electrical ignition switch. This actuator is made out of white medal and breaks very easy. I have replaced many of these because they break so frequently. They cost maybe $15 and labor is around an hour. They arent that bad to change. I cannot find repair info, but the steering wheel needs to come off and the ignition lock tumbler needs to com out. The whole upper part of the steering column needs to be disassembled.
__________________
I hope this helps. Please click the Accept button to close the question.

