How do i replace the ignition lock cylinder on a 1988 gmc sierra c1500 350 v8 with tilt steering.

it shouldn't be that hard , generally you would disconnect batt. turn key to run and there should be a pin under the column(or somewhere) that you depress and the cylinder comes out , it works like a rack and pinion , if you look in the cavity you'll see the rack that operates the switch and the cam on the lock have to match up , it's all in the detail , a pro lock smith can save you some $$ instead of the dealer , check you tube for any videos