EMD GP30 demonstrator 5629. Ogden, Utah. September 13, 1961. (Harry R. Brown Photo; Trains magazine, February 1962)

The fuel tank used on both GP30s and GP35s. On UP in Salt Lake City, August 1983. (Don Strack Photo)

The hood of a GP30B on a flat bed trailer for movement around UP's Salt Lake shops. September 1983. (Don Strack Photo)

The hood of a GP30B on a flat bed trailer for movement around UP's Salt Lake shops. September 1983. (Don Strack Photo)

The dynamic brake area on the hood of a former GM&O GP30. Shown without the dynamic brake grids in place. At Rock Island's Silvis shops, May 1973. Don Strack Photo

Side view of the special enlarged numberboard box on UP GP30 808. The modification was intended to provide space for a crew's grips after cabooses were no longer used, beginning in late 1984. On display in Salt Lake City in June 1983. (Don Strack Photo)

Rear view of UP GP30 827. (Don Strack Photo)

Front side view of the middle right side of UP GP30 827. Salt Lake City, July 1984. (Don Strack Photo)

Side view of the forward right side of UP GP30 827. Salt Lake City, July 1984. (Don Strack Photo)

Side view of the rearward right side of UP GP30 827. Salt Lake City, July 1984. (Don Strack Photo)

Top view of UP GP30 840. Salt Lake City, July 1983. The unit was in storage at the time, along with hundreds of other units on UP. (Don Strack Photo)

Top view of UP GP30 840. Salt Lake City, July 1983. The unit was in storage at the time, along with hundreds of other units on UP. (Don Strack Photo)

Top view of UP GP30 848, through the window of UP's south yard tower in Salt Lake City. May 1983. (Don Strack Photo)

UP GP30 860 being scrapped at Durbano metals, Ogden, Utah; March 1986 (Warren Johnson Photo)

UP GP30 865. Wrecked in September 1983 and shown here in May 1984 in Salt Lake City on a flat car awaiting sale for scrap. Sold in November 1984 to Durbano Metals in Ogden. (Don Strack Photo)

UP GP30 865. Wrecked in September 1983 and shown here in October 1983 just after the wreck. Salt Lake City. (Don Strack Photo)

UP GP30 865. Wrecked in September 1983 and shown here with its long hood and other components removed. Salt Lake City, December 1983. (Don Strack Photo)

UP GP30 865. Wrecked in September 1983 and shown here in March 1984 in Salt Lake City on a flat car awaiting sale for scrap. (Don Strack Photo)

A view of the left side of UP 875, the former EMD GP30 demonstrator. Note the shortened traction motor blower enclosure, immediately behind the cab. Later EMD units had their blower enclosures here, including GP30s, but since the blower duct crossed to the opposite side of the unit on GP30s, the enclosure is short on this unit, but extended to the walkway on all other GP30s. Salt Lake City, April 1973. (Don Strack Photo)

A view of the right side radiator area on UP 875, the former EMD GP30 demonstrator. Salt Lake City, April 1973. (Don Strack Photo)

A view of the right front of UP 875, the former EMD GP30 demonstrator. Note the stephole instead of a grab iron to allow access to the top of the short hood. Note also the GP9 style classification lights. Salt Lake City, April 1973. (Don Strack Photo)

A view of the right middle side of UP 875, the former EMD GP30 demonstrator. Note the holes in the frame side sill. This is the only GP30 with this feature. Salt Lake City, April 1973. (Don Strack Photo)

A view of the rear of the right side of UP 875, the former EMD GP30 demonstrator. Note the use of GP9 style classification lights. Salt Lake City, April 1973. (Don Strack Photo)