Addco shows front 1 1/4" (p/n 02018u) and rear 7/8" (p/n 02015u) sway bar kits for 1997-2001 Bonnevilles. Assuming Addco'* range of applications is OK, is there any reason these would not fit on a 2003 Bonneville SSEi? Thanks for reading.

If that'* one part number for that year range, I doubt it'll fit something. 97-99 should be one part and 00-03 should be another.

Yea, I was looking at illustrations on gmpartsdirect.com for the 1999 and 2003 Bonneville, and these are two totally different rear suspensions -- no way Addco'* bar would fit. Does anyone make a bigger set of aftermarket bars for the 2000+ Bonnevilles? My SSEi has more lean than I would like.

Not that I'm aware of.. maybe a call to them to verify which years that bar will fit?

I left a message for a fellow named Jonn Wright who handles the aftermarket tech support for Addco. At this point though, I am pretty much 100% positive these bars will not fit a 2000+ Bonneville. I will say this, Addco'* online catalog was compiled by monkeys -- there is so much obvious inaccurate application information, I would be reluctant to order anything without confirming the application with a human being.

There is a long, semi-interesting thread about these very bars and some of the problems that occured as the bars were being delivered at one of the Regal forums: http://www.regalgs.org/forum/viewtop...c852160aba083b

The only sway bars that I know of for the 00-05 Bonnevilles are those from Saner Performance in Florida. I don't think they are in business anymore, I'm not sure. I bought mine used a year ago from Zak Xado. He bought them used from someone at Intense. I have'nt put them on yet, I need to have them powder coated first, but the difference from stock is substansual. They are both solid. I cannot remember the spec'* off hand, I will check this Friday and post them here then.

It used to be.....
Saner Performance Fabrication
1449 Southwest Flounder Avenue
Port Lucie, Florida 34953
(561) 873-0238
www.sanerperffab.com

Doesn't look like they're around any more...

Looks like this topic http://www.bonnevilleclub.com/forum/...asc&highlight= is continuing back here, so ......
I'm pretty sure the rear sway bar used on the GXP is the same one used on the 00-? Cadillac STS'*. The part number is the same. Remember, they are hollow not solid. I'd like to know what idiot at GM pushed the use of hollow bars, (so far, I've cracked 2 of them on my Montana and Astro van.) I'm not sure if the fronts on the STS are the same or not. Definately worth a check though, as there are quite a few STS'* in the salvage yards. Also, I said I would post the spec'* on the Saner Bars that were designed for the 00-05 Bonnevilles. They are (FRONT 1&1/4 in or 31.9mm) (REAR 1.01 in or 25.5mm). Both are solid and heavier than H***!
Now I just need to figure out the best match of frame bushings for these. Then I can actually put them on instead of using them as decoration in my garage. At least they are keeping the (STILL UNINSTALLED) Ceramic TOG HEADERS, S1X cam & OER lifters company. I hope I have time next year to start puting this stuff on. Then, I won't have to be such a wana-be!

The rear bars on the 00-03 Bonnevilles (all models) and the 04-05 Bonnevilles with what GM'* parts catalog calls the "handling suspension" are the same 22 mm hollow bar (identical part numbers). The front bars for 01-05 Bonnevilles with the "ride and handling suspension" are also the identical 30 mm solid bar. The only thing different on the GXP suspension, as far as my research has shown, were the De Carbon rear shocks, which are specific only to the 04-05 Bonneville.

From what I was able to find on my 00 SSEi and in the Mitchell Parts book and on GM parts Direct before they changed it, (a search by part # use to show all cross ref. vehicles). The rear bar on 00+ SSEi and SLE cars is the (FE-2) 20mm. The 04-05 GXP is the 22mm (FE-5). This 22mm bar is part # 25666234 and is also used on most 98-04 Seville STS'*.