ExEMDLOCOTester wrote:OK... I looked at A J Kristopans GM Serial Number page... What happened to EMD 3 ?????EMD 3 was retained by EMD for testing purposes, however the unit is now working on BNSF, still as EMD 3. EMD 3 was exchanged for one of the Oakway SD60's a number of years ago. EMD 3 still rides on HTC-R trucks as well, being the first unit to test the radial truck design.