List of GM-EMD Locomotives - Six-axle Roadswitchers or Special Duty Locomotives (SD)

Six-axle Roadswitchers or Special Duty Locomotives (SD)

Model designation Build year Total produced AAR wheel arrangement Prime mover Power output Image
SD7 1952–1953 188 C-C EMD 16-567B 1,500 hp
(1.1 MW)
SD9 1954–1959 515 C-C EMD 16-567C 1,750 hp
(1.7MW)
SD18 1960–1963 114 C-C EMD 16-567D1 1,800 hp
(1.3 MW)
SD24 1958–1963 224 C-C EMD 16-567D3 2,400 hp
(1,880 kW)
SD28 1965 12 C-C EMD 16-567D1 1,800 hp
1,300 kW)
SD35 1964–1966 360 C-C EMD 16-567D3A 2,500 hp
(1.9 MW)
SDP35 1964–1965 35 C-C EMD 16-567D3A
Steam generator		 2,500 hp
(1.9 MW)
SD38 1967–1971 53 C-C EMD 16-645E 2,000 hp
(1,500 kW)
SD38AC 1971 15 C-C EMD 16-645E3 2,000 hp
(1,500 kW)
SD38-2 1972–1979 83 C-C EMD 16-645E3 2,000 hp
(1,500 kW)
SD39 1968–1970 54 C-C EMD 12-645E3 2,300 hp
(1,700 kW)
SDL39 1969–1972 10 C-C EMD 12-645E3 2,300 hp
(1.7 MW)
SD40X 1964–1965 9 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40 1966–1972 1,268 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40A 1969–1970 18 C-C EMD 16-645E3 3,000 hp (2,240 kW)
SDP40 1966–1970 20 C-C EMD 16-645E3
Steam generator		 3,000 hp (2,240 kW)
SD40T-2 1974–1980 312 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40-2 1972–1986 3,949 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40M-2 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40-2W 1975–1980 123 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD40-2S 1978–1980 9 C-C EMD 16-645E3 3,000 hp
(2.2 MW)
SD45 1965–1971 1,260 C-C EMD 20-645E3 3,600 hp
(2.7 MW)
SD45X 1970–1971 7 C-C EMD 20-645E3 4,200 hp
(3.1 MW)
SD45M C-C
SDP45 1967–1970 52 C-C EMD 20-645E3
Steam generator		 3,600 hp
(2.7 MW)
SD45T-2 1972–1975 247 C-C EMD 20-645E3 3,600 hp
(2.7 MW)
SD45-2 1972–1974 136 C-C EMD 20-645E3 3,600 hp
(2.7 MW)
SD50 1984–1985 421 C-C EMD 16-645F3B 3,500-3,600 hp
(2.6 MW)
SD50F 1985–1987 60 C-C EMD 16-645F3B 3,600 hp
(2.6 MW)
SD50S 1980 6 C-C EMD 16-645F3B 3,500 hp
(2.6 MW)
SD60 1984–1991 537 C-C EMD 16-710G3A 3,800 hp
(2.8 MW)
SD60F 1985–1989 64 C-C EMD 16-710G3A 3,800 hp
(2.8 MW)
SD60I 1993–1995 81 C-C EMD 16-710G3A 3,800 hp
(2.8 MW)
SD60M 1989–1993 461 C-C EMD 16-710G3A 3,800 hp
(2.8 MW)
SD60MAC 1991–1992 4 C-C EMD 16-710G3A 3,800 hp
(2.8 MW)
SD70 1993–1999 122 C-C EMD 16-710G3 4,000 hp
(3.2 MW)
SD70I 1995 26 C-C EMD 16-710G3 4,000 hp
(3.2 MW)
SD70ACe 2003- 842 C-C EMD 16-710G3A 4,300 hp
(3.2 MW)
SD70ACS 2009- 25 C-C EMD 16-710G3A 4,500 hp
(3.4 MW)
SD70M 1992–2004 1,646 C-C EMD 16-710G3 4,000 hp
(3.2 MW)
SD70M-2 2004- 180 C-C EMD 16-710G3 4,300 hp
(3.2 MW)
SD70MAC 1993–2004 1,109 C-C EMD 16-710G3 4,000 hp
(3.2 MW)
SD75M 1995–1996 76 C-C EMD 16-710G3 4,300 hp
(3.2 MW)
SD75I 1996–1999 207 C-C EMD 16-710G3 4,300 hp
(3.2 MW)
SD80MAC 1995–1996 30 C-C EMD 20-710G3B 5,000 hp
(3.7 MW)
SD89MAC 1 C-C
SD90MAC 1995–2005 400 C-C EMD 16-265H 6,000 hp
(4.5 MW)

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