Does sarcoidosis make sugar go up in diabetics ?

No, but steroids do: Sarcoidosis probably does not have much effect on blood sugar by itself, unless it is affecting the pancreas directly, which is very rare. However, steroids such as Prednisone are the most commonly used medications to treat sarcoidosis, and can most certainly cause elevated blood sugar.

See below: Sarcoidosis can be associated with recurrent pancreatitis which in turn can lead to diabetes. However; Prednisone use is the more common way that this occurs.