Need New Rear Tire Carrier

[Sundown94]

I just went on GMPARTSDIRECT.COM and found a "Carrier Assy" for $599.02 (MSRP $976.24), which appears to be the tire carrier assembly for 2005-2007 H2s. I think this is the one I am referring to above, but I'm still not sure if this will simply bolt right up to my 2003 H2. And from the sketch they provide, I am also not exactly sure if the latch is the automatic one that I was also referring to above. Can anyone help me answer these two questions before I fork out $600? Thanks again!!