No, they never ran at the GGRM, though we did MU one of them to the geep after cleaning it out, servicing the air system and doing a little electrical work. I get the #'s confused, but one of them (the one we worked on) was in far better shape than the other, though even it needed buku bucks and work itself. Unfortunately the powers that be kiboshed any work on it beyond our basic, informal survey.
I guess they are sisters to the CSRM unit. Both had SP plows, big fuel tanks and a bunch of other SP mods. Both had the DB's removed by a previous owner, but they both also had unmodified 567B PM's which had water leaks.