Classic Truck Specialist David Welch show us step-by-step how to replace the rubber that seals the Vent Window in a Classic Chevrolet or GMC Pickup. This job looks tough, but Dave show us how to handle this weather seal replacement easily. Make sure that when you install rubber in your vent windows, you also consider all the other seals on the door that will need to be removed at the same time and get your job all done at once.