key problems on 2003 Buick Rendezvous

i can not get my key inside the start, or ignition, is likely lucked.

1 answer 1 comment
Try another "spare" key in case your key is damaged. Try lubricating the lock/ignition switch. The mechanical tumblers in the lock itself may be damaged requiring the ignition switch tobe changed.
how do i change this switch on my own