Drive cycle procedure 2004 Buick Century. What is the procedure to unlock OBD?

What is your question?

I took my 2004 Buick in for an emissions test the day after it had sensors replaced. I was unable to get test because it read "Not Ready". How should my drive cycle be done to get it ready?

What makes this problem better or worse?

Dont know

How long has your 2004 Buick Century had this problem?

Two days