From the roof, you can now manually raise the bar that lifts the vent up and down. With a little jiggling, the vent will then slide off the hinge. Replace the new vent by first sliding it onto the hinge bar - pinch each end tightly with pliers so that it doesn't back slide off. Place the "lifting arm" - I really don't know what that piece is called, into the round slot of the vent lid's track. Go back inside and reattach the handle mechanism. Replace the screen, the handle itself, and the outside housing, and you're done.
It's tough when you have to manage not only your wheels but your roof as well. And guess what? Blue Truck isn't feeling too well after all. We're in the midst of scheduling an appointment.
'Tis the season ... for vehicle repairs?!