No. 3015 at Denali National Park. My wife and I just got off the train which originated in Anchorage.
Photo courtesy of John Combs
.

Number 3015 was rebuilt and repainted in 2001.  It also had Head End Power (HEP) added.
Photo courtesy of John Combs

.

ARR GP40 No. 3015 at Anchorage Diesel House. August 1981
Photo courtesy of Gary Munsey

Photo courtesy of Stewart Sterling, Anchorage, 5-82

Anchorage, July 3, 1979
Photo courtesy of Keith Ardinger

Fairbanks, September 1995

Alaska Railroad GP40-H #3015 idles at the end of the line in Seward, Alaska as passengers depart for various cruises and day trip options on Thursday, May 24, 2018. The 3015 was second out on this day's Coastal Classic. 

GP40-2 3015 provides the muscle on the Alaska State Fair train. 09/02/2018.
Photo courtesy of Mike Gerenday

GP40 3015 in Anchorage, 8/15/1984.
Photo courtesy of James Claflin
Jonathan Fischer collection

GP40 3015 on the McKinley Express (MEX) in Whittier, getting passed by the Denali Express (DEX). 5/14/2024.
Photo courtesy of Robert Krol

This was taken Saturday May 18, 2024 outside the 557 shop in Wasilla.
Photo courtesy of Terry Douglas