Here is a chord sketch for Steppin' Up. The song was written by Darren Rahn and performed by Eric Darius. A live performance can be seen here.
I wonder about the D7+5, but I think it's close to the chord used in the song. I recently updated this sketch (9/2013).
Each chord is played for a bar except when a semicolon follows the chord name, which means the chord is played for 1/2 bar.
Opening: Gm7 C9 EbMaj7 D7+5 A: Gm7 C9 EbMaj7 D7+5 Gm7 C9 Cm7; Bb7; EbMaj7; D7+5; B: Gm7 C9 EbMaj7 D7+5 Gm7 C9 EbMaj7 D7 EbMaj7 D7 Gm7; C9; Cm7; Bb7; EbMaj7 D7 EbMaj7 D7+5 C: Gm7 C9 Gm7 C9 Gm7 C9 Gm7 C9 EbMaj7 Dm7 EbMaj7 Dm7 EbMaj7 Dm7 Fm7 Bb7+5 Continue the song at section A with all chords raised one step, e.g., Am7, D9, FMaj7, E7+5...
Feel free to send me corrections at the e-mail address listed in the footer.