Unlike Pro Tools, Logic Pro does not draw a plug-in window for Pitch 'n Time LE. Instead, Pitch 'n Time LE is available as an algorithm inside Logic's own "Time and Pitch Machine". With the "Time and Pitch Machine" open, simply select Pitch 'n Time from the algorithm drop down box.
If you still are unable to find Pitch 'n Time, make sure it is enabled. Read thisFAQ to find out how.