USA GP-7 L 1829 is in Chattanooga Tennessee, at Tennessee Valley Railroad Museum.  As you can see it still is in it's as built configuration, leading me to believe it never made it to Alaska. I rode on this loco in the mid-90's on a TVRM excursion 25 years after riding on one of it's siblings at Eielson AFB in the early '70s.

Don Walker
Texarkana, Texas

Photo courtesy of Tom Sink via Chris Starnes

GP-7L #1829 at the Holston Army Ammunition Plant in Kingsport, Tennessee, June, 1987