My 1990 TGP has the "FWW" springs up front. Anyways, Shawn(GnatGoSplat/the W-body admin) once posted that the stock TGP spring code was "FUZ"(one step lower on the spring code chart). Also, do any of you have a part # for the stock spring code. The one that's listed for the FWW spring on Shawn's site doesn'tt work @ GMpartsdirect so I'll assume they're not made anymore? I don't need springs for my car, but I'm planning to put some stiffer ones on my dads '94 Buick Regal soon since he's wants a firmer ride/better handling(talked him into modding the Regal some :D ). It's bouncy/mushy as hell with the stock springs(the Regal has the "FUZ" springs and FE1 suspension). I also posted this out of curiosity to see if any of those other codes were used on our cars.
http://www.w-body.com/spring-codes.htm
The spring code chart that Shawn has is the most complete, though I think there were some other ones I found but the point is when I talked to my parts guy, of all the codes listed by Shawn, only 2 were available any more, all the rest had been dropped! The part number you ran might also be outdate so call a real dealer to get an updated part number "if" its not one of the discontinued ones, they will also be able to tell you which ones they can still get!
Also I have both the codes you listed here on different TGPs I have seen and own.
Jeff M
I just went out and checked and I have 'FUZ'. 8)
I checked a few of the other part #'s on gmpartsdirect and some of the higher load rating springs are still available, I think they were around $40/each spring though them.