My '89 Caprice w/ a F41 suspension option, lists a "GU4" as well as a
"G92" on the "options sticker" inside the trunk lid. Since both of
those codes refer to the differential ratio, it seems like a duplication.
Anyway, it's rather unclear. Can anyone elucidate?
BTW, I tried Edmunds.com to learn more about my car. I entered
its VIN, and it came back claiming that is was an LS Brougham.
It is not----it's just a plain (though loaded) Brougham. So, in
other words, one cannot always believe what they're told,
regardless of the type of source of the info.