I have just noticed that my LTZ's headlamp washers dont work. I checked the fuse it was blown, changed the fuse an this too blew. Has anyone else had this problem? I wonder if there is a problem with the relay whichhas caused a short circuit. This problem only came to light when I was driving the car home just after having it serviced at the Chevrolet dealer, by a Vauxhall mechanic.