Replace door sliding window?

[wsiliezar]

Hello, new member here. I bought a house a month ago and I'm doing some work on it. The back door that goes to the sun room has a vertical sliding type of window that i want to replace because it's not efficient. Is there a way to replace this or should I just replace the entire door?

 

[billytavares]

I saw a youtube video on how to do this a few months back. I'm sorry but I can't remember the address. Maybe you can just do a search there. I hope that helps.