One is 1/2 hour east of city, still a dealership tech, works wknds out of his own shop, does egr deletes, diagnostics, and general anything from 7.3-6.7's, fair prices, and you can supply your own parts or let him get them, other guy is ford and cummins guy, 6.0 wizard, located Stittsville, ex dealership tech , now has his own shop, both these guys are reasonable, and only fix what is broken, unlike the stealerships around here that keep replacing parts til its running good. Msg. Me if you need help, i also own towtrucks, so, if you are already broke down, get hold of me and we will get your rig to one of them.