TheEMD SD38 is a 6-axlediesel-electric locomotive built byGeneral Motors Electro-Motive Division between May 1967 and October 1971. It had anEMD 645 16-cylinder engine generating 2,000horsepower (1.5 MW), compared to the turbocharged EMD 645E3 V-16 engine that produced 3000 horsepower. Aside from the 3-axle trucks and a longer frame to accommodate them, the SD38 was identical to theGP38; the SD38 had the same frame as theSD39,SD40 andSD45. 52 were built forAmerican railroads, one was built for aCanadian railroad, four were exported to a mining firm in Jamaica and seven were exported to a mining firm in Venezuela. The SD38 was succeeded by aDash 2 version called theEMD SD38-2.
An M version of SD38 was built for the Brazil Federal Railways (RFFSA - Rede Ferroviária Federal S. A.).
Forty of a passenger version, the SDP38, were built for the Korean National Railroad in May-July 1967. The units were numbered 6351–6390. It was later changed to 6201-6240.