To be chilled to the bone means to be extremely cold, and this context describes being extremely cold because of the gust of wind.
Consider the statement "A gust of wind blew into the trailblazer, extremely chilling me, as foster pulled the passenger side door open for his sister.". Is the statement "A gust of wind blew into the trailblazer, chilling me to the bone, as foster pulled the passenger side door open for his sister." false? Yes/no/unknown