key problems on 2003 Buick Rendezvous

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

Asked by for the 2003 Buick Rendezvous
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

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