<font color=purple>Yeah, the 2500HD is an as-of-yet unreleased single-wheel ONE-TON rated at 9200 GVWR. All '01 & newer 3500 models will only be available in dual real wheel configuration.
The current 2500 Silverado/Sierra & 2500 C/K are actually BOTH rated at 8600 GVWR & BOTH come standard with 9.5" SF 14-bolt, and a 9.25" IFS front - they also share trannys & standard T-cases. The only significant differences between an 8-lug C/K 2500 & an 8-lug Silverado/Sierra 2500 is the body style & engine availability.
My understanding is that you can get a 10.5" FF 14-bolt on 5-speed Sierra/Silverado 2500's (and POSSIBLY on big-block & diesel equipped C/K 2500's), but not with 350 powered C/K trucks & not with automatic 2500 Silverado/Sierras.
And the 6-lug "light duty" 2500 (essentially a "heavy 1/2" at 7200 GVWR) while previously available in 4x4 trim in the C/K models is only available as 2wd in the Silverado/Sierra line. All 8-lug 2500 Silverado/Sierras are actually "heavy 3/4 tons" at 8600 GVWR & as such, are emmissions & CAFE exempt.
To add to the 14-bolt confusion, the new 2500HD will be available with an all-new 11.5" FF "super 14" 14-bolt rear, though whether that's standard, or if it's an upgrade is unclear (maybe optional with the 6.0 & standard with the 8.1 & Duramax??). It will be standard on the 3500 though. And one last thing, GMC has used the Sierra name as a model name for a few years, though I suspect you can still reference C/K designations on all but the newest body style.
Now, one would wonder why GM would designate its single-rear-wheel one-ton as 2500HD instead of 3500. I don't know, but have a theory. First, despite a GVWR equal to the F250SD & the 2500 Ram, the 2500 Silverado/Sierra has a superior ride & drive, and is much more user friendly. Also, unlike those others, there is no engine upgrade over the base engine - no big block, no V10, no diesel. So, I think GM sees the 8500 GVWR F250 7-lug (which is NOT emmissions or CAFE exempt) as the primary competition for the 2500 Silverado/Sierra. And by marketing that truck as direct competition for the 5.4 powered F250 (and even the 5.9 powered 2500 Ram), GM can illustrate clear superiority of the Vortec 6000 over its "competition". Also, with the one-ton single-rear-wheel being such a small part of the market, GM can now market its 2500HD as both a heavy 3/4 AND a single-rear-wheel one-ton.
Just a theory.[img]/wwwthreads_images/icons/crazy.gif[/img]</font color=purple>