1990 GMC Sierra

Someone tried to steal my 90 GMC and broke the plastic steering column cover to gain access to the ignition mechanism on the left side of the steering column. A part of the starting mechanism was broken and now I can’t turn the key. The key cylinder doesn’t look damaged. I hear these vehicles are easy to steal with only a screwdriver to pull back on the mechanism and then the vehicle starts. Do you think that the damage to the mechanism is causing the key to not turn? I have a replacement kit for the mechanism and cover but not the ignition tumbler. Thank you for your help.