Originally Posted by: bigbudaI am playing the song Tears In Heaven by Eric (Slow Hand) Clapton. I like using the chord progression C, G, Em, F, C, G for the verse but not sure what chords to use to get the chorus to sound right. Any suggestions?

Chord substitution is not what you are looking for.
Chord substitution is when you already know the chords, and you wanna substitut them with other chords that sound different, and yet; close enough to not destroy the harmony of the song.
Having said that, the chords for the chorus can be: Am, E, Gm, Am, Dm, G.
And just in case you ment a different key, here is a link in which you have an interactive chord help.
I hope this helps.
Or you can move the thread to the Guitar Tablature section, since your question has nothing to do with theory anyway.
Again. I hope you have what you were looking for.

http://www.e-chords.com/cifra/idmusica/6761.htm