Options Explained

I am brand new to this forum and would like to start with a question that may seem easy to some, but is difficult to me. I have just recently acquired a 1997 Silverado K1500, and went through GMVIS to get a listing of all of the options codes that this vehicle came with when it was delivered new. Is there a place where I can go to get a description of what these codes mean? For instance, it has "X88 - CHEVROLET CONVERSION" as one option, which is a mystery to me. Thanks for any help.

X88 simply means its a chevy whereas Z88 means it would be a GMC.

What other codes do you want the definition for?