Which frequency should be used for communication with GC North Tower specifically for runway 10L-28R?

For communication with the GC North Tower specifically regarding runway 10L-28R, the appropriate frequency is 121.90. This frequency is designated for the purpose of coordinating operations and managing air traffic at O'Hare Airport. Using the correct frequency is crucial for ensuring clear and effective communication with air traffic control, which is essential for the safe and efficient operation of aircraft, especially during takeoff and landing phases.

The other frequencies listed serve different functions or areas within the airport and are not assigned for communication specifically related to runway 10L-28R. Each frequency is tailored to specific operational needs or sections, and knowing which frequency to use helps in maintaining safety protocols and managing traffic flows effectively.