From what I've read through the brochures and online douments, the LATCH system is only incorporated in the Crew Cab. If safety is a big concern, a Crew Cab can also have side- and curtian airbags, which isn't an option for the KC (from what my dealer told me). Safety was a concern for me personally, I even got 4x4 mainly for the VDC (That saved my butt so many times in my Armada). If it counts for anything, the bed extender adds a significant amount of bed room. I don't think it will add up to the KC length, but it will fit a 53" widescreen
(as long as I can move my TV, I'm happy)