When You Say Nothing At All by Alison Krauss & Union Station is in Ab at 100 beats per minute and runs 2:31 across 25 bars. It uses 3 chords — Eb, Bb, Ab. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? When You Say Nothing At All guitar melody tab.