J.M.
Hi,
My 4 year old niece lives with my mother-in-law lives and up until a few weeks ago, used a pacifier to go to sleep. My MIL looked for a solution and someone told her to cut off the end of the pacifier. My niece tried to suck on it and rejected it. She cried a couple times at nap/bedtimes, but is now pacifier free.
Another suggestion would be to get him attached to something else at bedtime instead of the pacifier, like a special sippy cup or blanket.
A little about me: I have two boys, 33 months and 2 months. Both rejected pacifiers when I tried to give myself a break (both breastfed exclusively).
Good luck.
Jen M