Question About DJ-5D Postal Jeep

How do you let the window down on a 1976 AM General DJ-5D Postal Jeep? I cannot figure it out.
Also, will a CJ5 radiator fit the DJ5?

There are slider locks under the window on the inside, slide it and try pulling the window down. Mine has a little metal handle on the top of the window to hold onto to move the window up and down. If it doesn't move, slide the lock the other way. The slider lock looks similar to a bolt lock on a restroom stall door. Hope that helps. I have a 75 DJ-5D also.:smile: