There are a number of songs with the title "Thank You Lord". The list of songs posted on this thread includes the song "Thank You Lord {For All You've Done For Me."

I've posted two more songs with the title "Thank You Lord"-"Thank You Lord {I come before You today}" and "Thank You Lord {I Just Want To Thank You Lord}" on the Mudcat thread "Songs of thanks":
thread.cfm?threadid=106472&messages=12#2200719

In my next post to that other Mudcat thread, I've also posted the lyrics and a video link to the song "I Want To Thank You {"Heavenly Father for shining your light on me"}

That song is interesting. Is it a religious song or is it a R&B song? Maybe it's both.