If you plan to buy a cladded AV one thing to inspect thoroughly is the sheet metal behind the lower cladding since they haven't been made since 2006 they are starting to show their age and some members have had to have the cladding removed and metal repaired or replaced then cladding reinstalled to restore the Av.
To help with many acronyms used on this site check out this thread:
http://www.chevyavalanchefanclub.com/cafcna/index.php?topic=18925.0
There are many old threads where members good heartedly teased the different styles of AVs. No real name was finalized for the original cladded AV. Some called it original, others said it looked like a Tonka Toy, Tupperware, or wearing plastic pants. The cladded AV owners called the WBH (without body hardware) Av as being nekkid, or wearing a bikini due to lower door side trim ,or even a Silverado wanna be. All in good fun though.