Steering Column Repair: 1991 astro key, turn signal switch, thrust washer


Question
ign. key will not turn, kinda like its wrong key.but it's not.if key cylinder has to be changed can i get info. on how to do it. thanks

Answer

gm lock
To replace Ignition lock cylinder:


•  Remove horn pad attaching screws.
•  Pull pad reward, then turn horn lead insulator in counterclockwise direction to disconnect horn lead.
•  Remove steering wheel attaching nut and retainer
•  Using suitable steering wheel puller, remove steering wheel.

•  Using a suitable tool, compress lock plate (horn contact carrier on tilt models) and remove snap ring (C-ring on tilt models).
•  Remove lock plate, canceling cam, upper bearing preload spring, thrust washer and signal lever.
•  Remove turn signal lever or actuating arm screw, if equipped, or on models with column mounted wiper switch, pull lever straight out of detent while rotating the arm. Depress hazard warning button, then unscrew button.
•  Pull wire connector from bracket on the bottom of the column and wrap upper part of connector with tape to prevent snagging the wires during removal. On Tilt models, position shifter housing in Low position. Remove harness cover.
•  Remove retaining screws and remove turn signal switch, then remove buzzer switch.
•  Remove lock cylinder key warning buzzer contact and the lock cylinder  retaining screw and lock cylinder.
•  Align cylinder key with keyway in housing, then push lock cylinder assembly into housing until fully seated.
•  Install lock cylinder retaining screw.
•  Install buzzer switch, turn signal switch and steering wheel.

Here is a website that offers more detail for a similar column
http://www.fieros.de/en/articles/steering.html