When Pulis arrived at Selhurst Park in November, Palace had just four points from 11 games and were destined to be relegated back to the Championship.
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And Bolasie insists Pulis' impact was instant.
"Everyone just went 'wow'," Bolasie told the London Evening Standard.
"It was no long speeches, it was short and sweet. We knew he was serious.
"He told us he had never been relegated, he stated that fact on his first day. He gave us belief and soul."
Pulis is believed to be a major contender to win Manager of the Year and Bolasie believes the Welshman deserves accolades for what he has achieved this season.
"He has to be up there for manager of the year," he said.
"Every pundit had written us off, said we'd be relegated by Christmas. Secretly we all thought it would be a long season, especially the way the results were going. The gaffer has changed a lot and we are playing unbelievably."