Originally Posted by JMN57

To be clear, Global Entry will give you a Trusted Traveler ID # which can be entered into your FF profile with various airlines. If that airline is in the PreCheck program, you will then be able to get PreCheck at airports which offer it. Of course, it comes with all the caveats that PreCheck is not guaranteed, etc.

My Global Entry based TT# has gotten me PreCheck on US and DL in addition to my AA access first as EXP and later both EXP & GE.