2004 buick rendezvous sunroof on 2004 Buick Rendezvous

I have a 2004 rendezvous and had glass on electric sun roof broke. It states it is stock sunroof and not after market. I went to junk yard and found one, but it looks 3 times the size of the glass I have. Is the glass under the panel that much larger than what we can see? Thanks

Asked by for the 2004 Buick Rendezvous