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Those double springs for the front should work for an envoy Denali right? I looked on the gmparts site and the same struts are listed for the Trailblazer ss as well. I'm glad a came upon this thread cause I was looking for help with stock components and wanted to upgrade to the Trailblazer sway bars and change my struts and shocks since I have 178k on the truck.
 

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So our trusty TBSS has turned 195,000kms (about 122K miles) and I would say that it is due for some new shocks, springs and a few other tidbits by the time it hits 200,000kms around Spring. It already has new MOOG ball joints, end links (F&R) outer tie rods, and TIMKEN wheel hubs.

A few considerations:
1. Must maintain stock ride height because we have 32" tall tires;
2. Improved motion control (dampening/rate to handle the heavier tires) without totally fucking up the ride quality; and
3. Fit a reasonable budget (ie. no coil-overs).

Here are most of the parts I have found that would be worth replacement and their various options (in no particular order):

Front
Shocks
ACDelco (OEM Bilstein) 540-481
Bilstein B6 (HD) 24-103336

Belltech F&R (combo) from the TBSS store

Swaybar Bushings (34mm)
Hotchkis 21810114
Prothane 7-1187-BL

Control Arm Bushings
Prothane 7-242-BL

Rear
Shocks
Monroe 58644 "coil over style" http://www.tbssowners.com/forums/showthread.php?t=94987
Bilstein B6(HD) 24-103343 (air suspension)
Bilstein B6(HD) 24-103350 (coil suspension)

Swaybar
Addco 29mm http://www.summitracing.com/oh/parts/aco-2211
Belltech 29mm 5530 http://www.summitracing.com/oh/parts/bel-5530
Hotchkis 27mm 2272 http://www.summitracing.com/oh/parts/hss-2272
DJM 27mm from the TBSS store

I cannot find the proper stock replacement front or rear springs (other than air); or the rates/data on much of the aftermarket parts offered. Can someone convince me of the legitimate benefits of going aftermarket?
[/QUOTE

I have been trying to find bilstien shocks and struts for my tbss. I don't want to lower it and from what I have read the belltech pretty much sucks. I have seen numerous people say that. I was about to buy Moog strut assembly and rear shocks.

I see this write up and now I have hope. I run 275/45r20 on my truck. I see your specs on the shocks and struts. My question is I am looking at:

Bilstein B8 5100 (24-267014)
Ext length 16.410
Collapsed length 11.260

And for the rear

Bilstein B8 5100 (24-267021)
46MM monotube

Will these affect my ride height
 

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have been trying to find bilstien shocks and struts for my tbss. I don't want to lower it and from what I have read the belltech pretty much sucks. I have seen numerous people say that. I was about to buy Moog strut assembly and rear shocks.

I see this write up and now I have hope. I run 275/45r20 on my truck. I see your specs on the shocks and struts. My question is I am looking at:

Bilstein B8 5100 (24-267014)
Ext length 16.410
Collapsed length 11.260

And for the rear

Bilstein B8 5100 (24-267021)
46MM monotube

Will these affect my ride height
 

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2006 TBSS AWD
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How did the 45H0382 / 19261985 springs work out for you? I am getting a lot of conflicting information as to whether or not these are the correct factory SS springs. If you could please comment, it would help clear up a lot of conflicting information.

I asked the same question in a different, but similar thread: front spring comparison

What about AC Delco 45H0382 GM# 19261985? Are these the same exact springs I already have in my '06 AWD SS? I am replacing all the struts and rear springs with Tony's kit and I want to use new springs in the front. I want to keep the same exact ride height with the spring rate and ride quality

AC Delco 45H0382

Front Spring Relaxed Length 15.2 In.
Grade Type Premium
Load Rate Front 1755 lbs
Front Spring Seat Included No
Wire Diameter 0.670 in.
Load Rate Front 796 KG
Spring Rate Front Constant
Front Spring Compressed Length 10.5 in.
Spring Material Steel
Front Spring Inside Diameter 3.7 In.
Spring Color Black
Alternate/OEM Part Number(s): 19261985
 

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2006 Black TBSS
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After much research (phone calls, emails, texts, PMs, and measuring) and deliberation (aka. indecisiveness) here is what I settled on:



Note: I will be getting the rear shocks for about $56 each through a price match; and everything listed is either OEM replacement or a mild upgrade.

It is important to note that the ACDelco/Bilstein 540-481 struts are a 46mm mono-tube body (from this article: Chevy Trailblazer SS - Super SUV Road Test - Super Chevy Magazine) just like the HD shocks; only their extended length is 16.61" and collapsed they are 11.41" (the only info ACDelco could offer), therefore the stroke is 5.2" and it is designed to work with the OEM 25mm lowering springs.

I went with the 4600 series HD shocks in the rear (the OEMs have a 36mm body) because my rear ride height (18.5" eye-to-eye) is pretty much dead centre in their 8" stoke (22.86+14.86=18.86"). It is clearly marked in the rub marks on the grime on the factory shocks, that my rear suspension travel is ~4" on compression. We will be sticking with the air bags for now, but if the they fail we'll look at springs or Gen 2 bags (Gen 2 Air Bags).

There ya go. Want stock ride height? Buy stock parts.

Another huge issue for me was mono-tube vs. twin-tube:
Monotube vs. Twin-Tube - Fastline Performance Enterprise




You can see where the added stroke in the Belltechs comes from:



Mono-tube is superior in this application, IMO.

[quote="ACDELCO 45H0382 (19261985) Front Springs]
Spring Material Steel
Wire Diameter 0.670 in
Wire Diameter 17.02 MM
Spring Color Black
Grade Type Premium
Load Rate Front 1755 LB
Load Rate Front 796 KG
Spring Rate Front Constant
Front Spring Seat Included No
Front Spring Inside Diameter 3.7 in
Front Spring Inside Diameter 94 mm
Front Spring Relaxed Length 15.2 IN
Front Spring Relaxed Length 386.1 MM
Front Spring Compressed Length 10.5 in
Front Spring Compressed Length 266.7 MM
[/QUOTE]

I know this is an old thread but maybe someone knows as there is almost no info out there. These struts seem to have the extended and collapsed range of the no longer in stock delco 540-481 that came on the SS 16.61" and 11.41". Has anyone tried these? Belltech is a last resort, too many unhappy with them.

2006 CHEVROLET TRAILBLAZER Gabriel G51718 Gabriel Ultra Shocks and Struts | Summit Racing
 
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