bhai gm ko coach type ke term ki shayad hi kabhi jaroorat padti hogi.. mainly gm work is developmental work of zone and to do inspection and mostly signing of various imp document...
coach modification and modernisation to sab drm ka kaam hota hai aur wo bhi mostly maintenance shed ke officer ko sari responsibility dete hain.. when we send grievnce to gm then they (staff of gm ) also forward it to official in shed and sometimes they also not able to tell because they depend on rb order...