One problem related to wiper has been reported for the 2005 Chevrolet Silverado. The most recently reported issues are listed below.
Cold air blowing instead of hot air and could not defrost windshield. Had to pull off road and scrape inside of windshield. This has occured several times over the years where hot air is coming from passenger side and cold air coming from drivers side. Very dangerous if you cannot see through the windshield as windows fog or freeze up.