http://www.chevytalk.org/fusionbb/showtopic.php?tid/205683/ this guy seems to have the same problem as you and I, and i plan on trying it out when i get a chance so i cant vouch for the idea. Googling windshield vacuum motor i found some other sites that most suggest doing the same thing as the link above. As an add on question does anybody know the amount of vacuum needed to operate the motor?