Dear SteelCityRKP

accept my heartiest welcome to this forum

The question you have asked is really good one and I recently I found myself in same situation asking mself the answer to it
recently one of my Muslim friend asked me same that what is evil il in sikhism jsut like iblis in Islam and satan in christianity .

And I had a thought on it and what came up as answer wwas

In sikhism as I have been able to understand teh most basic nature of man should to be always in remembrace of Akal Purakh ( God) ( as said by unstopable singh)so any thought and action you do while ignoring God is evil and that is the time you work with your own mind and believe firmly that this what other religions like islam call satan or evil .
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-sikhi-sikhism/3126-sikh-concept-of-evil-devil.html

bascially you cant do nay nonesense ,any thing that could be harm to any body if you are doing it keeping god as you witness ans as in sikhism each and livingh beig is just a manifestatio of god anly so in sikhis m whwn we do any work for our interest ignoring the god and using our own mind ( also called manmatt in sikhism ) is Evil and any thing done with remebrance of god and keeping him witness of each and every moment ( also called gurmat in sikhism ) is good
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=3126
I hope it help you in some way to reach any conclusion

jainder Singh