My dealer was contacted by GM commercial duty a couple days ago and said they would not start the build on my truck because of a problem with the rear sliding windows allready produced. They were trying to engineer a fix.

Does anyone know of this problem?
Anyone have a Full Siding Rear Window on a C4500?
Is this something different than a regular rear slider on a HD?

I canceled that option today so they would get started, but would still like more info.

I ordered a 5500 back in Feb and it goes in production on 4-18 and they have yet called regarding my rear slider! I sure hope they don't hold back, I need my new truck last week!