Ok. Huh. I guess I just noticed that it looks like a big piece goes under your dash first maybe. Notice how what the thing it pushes up against is a different color than the brackets (on mine)? The brackets are the color of my truck. That other part isn't. On yours the top is the same color as the brackets. That's why I'm thinking that off color part is missing on yours. I think it's more part of the dash than part of your heater duct...like possibly something you took off & it's laying around the garage somewhere..could be a difference in years, though, yours may be different than mine.
That's all I can think of, but I really don't know what the hell I'm talking about.
