Any of the typ green coolant will be fine in a early 99 and older PSD, for the late 99 and newer the Gold can be used if a good flush is done, not hard just boring, but the Gold lacks min cavitation requirements right out of the jug. There are much better coolants to be used. The Fleetrite ELC and Rotella ELC ( SAME product different packaging) are excellent choices, good for 300K and up to 600K if a extender is used at 300K. It is what the OTR trucks use.
NCH