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When measuring across from clip to clip... All 3 on the coupe are 55" on the money, On the Vert they are all 54 1/2, this will also make the carpet lay funny unless trimmed.

Now how about some actual measurements? Did what I could, where I thought I should. Found a few things I will do my best to articulate. Because of the rear seat reinforcement on the Verts... It makes this measurement about 1 1/2 inches shorter when measuring to the very peak of that hump than on the coupe. That will affect the way the carpet lays as well as...

I attempted at least 6 videos but I suck at making them. I don't even know what I was trying to say. I`m 100% convinced that the coupe carpet is trimmed into place as it was being installed. The Vert carpet has all the signs around the edge were it was cut with a carpet knife while the coupe carpet has straight edges from the machine that produced it. Vert Coupe I lined them up as best could be using the drivers side pad and a straight edge. Aside from the larger hole for the center console I could not find a difference accept around the edges where it had been cut. The Coupe carpet has nice smooth edges while the Vert carpet is fraying in the places a knife cut it.

The pinouts and the functionality of the radio module is likely the same on your HU. Based on the last page, it appears that there is a 5 volt signal used (C2 pin 12) to switch from radio mode to “aux input” mode. While you won’t have the external wiring harness like the Regal does where all the mods can be done, you may be able to use the info to trace the pinouts in the display portion or the radio module of your HU in order to do it. From what I remember from having my my cutlass HU open all those years back is that there is a connector C2 like shown above going into the radio receive module from the display/tape deck portion of your HU. If there is enough room, you could potentially make all of the mods within that harness. What I can't recall though is if the wiring for that connector is in the form of wiring harness, or if it is more of a ribbon cable setup. Gotta say....looking at all of this is making me re-consider doing this mod to the Regal.

You're wanting to do this for the STE, right? If I remember correctly, all of the early 1st gen Ws used what is essentially the same radio module. The main difference being that some used a separate display and tape/CD deck (Regal and earlier GP), where as others had everything packaged in the form of a 1.5 DIN HU, with the radio module still being a separate, removable item. When I had my 92 cutlass, I had replaced a non-functional tape deck with one from an 88 Regal with the 5 band EQ, as it was the exact same part....just contained in a vastly different package. My Regal FSM has a section that identifies the various connecter pin outs, and also seems to imply that there is 5 volt signal used to switch between Radio and "Aux" inputs. I'll post up some of the information, as it may help in your case.

SB, great vid and I'm sure very helpful to pursue that avenue . Do you have part numbers? 55.... I'm having a trusted shop do the work as I don't have the equipment. They are experienced mechanics and I'm confident can handle the job. Thanks tho

You'll probably need some instruction on how to get the spring in & out....without the *compressor* it is a bit of a task, one has to disassemble the rear suspension to get the old one out & the replacement in.

The tape deck definitely still works - I was just hoping for a more “integrated” solution that I know folks have done - just cant find the detail on “how”. thank you!!!

Thank you all for the suggestions and helpful information. Found a spring at a reasonable price with reasonable shipping. Shout out to 55... for the part source. After arrival and install I'll check in again.

I know, I know this is taking forever. Much work remains before we are ready to announce the success in the team's ability to not accomplish anything. I didnt see a question about reinforcements but they are indeed there, the VIN number is on the drivers side. They jut in a bit on both sides at the rocker panels so the coupe carpet would be a bit wide in this section. I`m confident it would work, I just dont have the extra $400 for the mass backed carpet I want in this bear market! I`m working on getting a donor coupe carpet in the Vert now and seeing how much and wear it needs to be trimmed. If I cannot update this week then this weekend.

55 .... Thank you! Great information. White ....very helpful also! Appreciate it. Gives me hope lol

generally speaking I would go after a earlier car 88-91-ish the earlier springs seemed to not sag as badly

About the most direct approach would be to make use of car-part.com, select a Grand Prix, the results should cover all years using the fiberglas rear spring, you'll want one that matches your cars suspension options. Car-part refers to the rear spring as.....*leaf spring, rear* do a *north east* search.....the most expensive displayed was $180...the cheapest was $35 one location in Syracuse *Central auto recycling* came back with a spring at $100 https://car-part.com/

Hi, I'm hoping for a final answer also. Please reply when you have chance. Thanks

Does the tape deck still work? If so, might be worth using a Bluetooth cassette adapter. I use one in the Regal and it works pretty damn good. I did need to shim the tape head in the adapter for it to work well though. The one I have has a small wire/dongle that sticks out with a button to turn it on and off, pause and skip tracks, and it also contains the mic for hands free calling. For around $20, it might be a good alternative for a fair weather vehicle. I did consider modding mine, but I haven’t decided to pull the trigger yet, specifically because I don’t drive the car daily….and when I do, I don’t always have going anyways. Here is a small sample of how it sounds. There is some “tape print through” in the actual track that came through very clearly in the video, which kind of shocked me that my phone picked it up….but it also helps show how well the thing actually works. IMG_0575.mov

Agreed. The unwillingness is the problem. It's unfortunate, the car is an otherwise very serviceable vehicle. At this point I'm at a loss for a solution.

Originally teal, dark gray interior w/284 5-spd, quad buckets & AQ9s, HUD, DIC, 95 engine & alt upgrades, 96 brakes.

Thank you so much. Just didn’t want to dry any seals out or anything. I coated everything with oil again.

Just beautiful! What was the factory color though? What color interior?

What about this?

I try to post W's being up for sale here in the appropriate thread. Nothing comes to mind right now but always looking.

Hi, I’m trying to find a 91 to 93 Grand Prix GTP in decent shape in either red or blue. any help would be greatly appreciated. thanks

Well, a spring shop will only deal in steel items, they can't fab a glas item, this isn't rocket science, any shop can do the job, they just have to show the determination to take on the task. The glas spring is a parabolic design (thicker in the centre, thinner at the ends, making one in a steel configuration is a no-brainer as multi leaf springs are the same sort of design, One selects the single width of each leaf & the thickness to get the wanted spring rate & load rate, It involves cutting the blanks to the required length to make the stack, because the original is a transverse single spring the time consuming part of the job is the mechanic having to arc each leaf individually & get them near perfect in their arc so that each side off centre is near identical & lets the car sit perfectly level from side to side.

Not far south of Albany NY. Local junkyards have nothing and few suggestions. The spring shops say 'fiberglass, we don't do that' and show no interest in helping out further. Found on in Kentucky, place wants just shy of $400 (350 shipping!). I'd just put in spring struts if knew what exactly to get, I'm reluctant to experiment as that may just end up with a bunch of parts and no money lol. Appreciate the reply