I have been considering how to support the edge of the cowl cover beneath the windshield for several months. Yesterday, inspiration grabbed me as I pilfered the scrap pile: the A-pillar from the 2001 Malibu has the perfect shape for brackets. I cut seven one-inch pieces from the A-pillar and made some mounting plates from some 18-gauge scrap. I cut vertical slots in the mounting brackets, welded the plates to the brackets and screwed them into the firewall. The slots allow adjustment to hold the cowl cover against the bottom of the windshield frame loosely enough to allow me to slide it into place, making it removable.