Trains.com

Home / Train Basics / After the air horns were removed, what is that part on the Union Pacific GP9’s roof?

After the air horns were removed, what is that part on the Union Pacific GP9’s roof?

By Cody Grivno | August 8, 2022

Diesel locomotives have many different parts

Email Newsletter

Get the newest photos, videos, stories and more.

Trains.com Unlimited logo

Unlimited Membership required to continue reading or watching

Start a free trial of the Unlimited Membership and get all access to everything on Trains.com across brands including, magazine archives, video series, workshops, live webcams and more.

Learn More Start Your Free Trial