Bilstein 6112 thread for ‘19-‘20

ColoradoCub · May 26, 2021

I just ordered 6112’s and 5160’s, and a 2” block for the back to add some rake. God I hope it makes this truck ride better!

BowtieBill · May 26, 2021

16 hours ago, ColoradoCub said:

I just ordered 6112’s and 5160’s, and a 2” block for the back to add some rake. God I hope it makes this truck ride better!

I think you will be happy. I did the same set-up, except with a 1" block.

ColoradoCub · May 27, 2021

6 hours ago, BowtieBill said:

I think you will be happy. I did the same set-up, except with a 1" block.

yeah I tow stuff and there’s nothing worse than running around nose in the air and ass end sagging. Especially on mountain roads where the headlights become ineffective. I only have 1” difference between the front and back fenders in stock form and if I stand in the bed the rear is lower than the front.. that’s no bueno.

Moledigger2019 · May 28, 2021

On 9/30/2020 at 2:43 PM, BossTaco2020 said:

Bump! Would love to know if anyone has the 6112's on a TrailBoss?

Mine just cam in this week. Will be installing them soon.

Christopher Biggers · June 11, 2021

I am new to the site but have been lurking for a while.

I see that Bilstein offers two different part numbers of the 6112 for the T1 Silverado, 47-293557 for non-Trail Boss and 47-309524 for the Trail Boss.

Does anyone know if the Trail Boss version is longer to begin with or if it just has higher c-clip ? Do they use the same spring rate? Does anyone know why it doesn't show as being compatible with the Sierra AT4 Duramax?

I have a 2020 RST Duramax and am trying to lift 2.5-3" in the front and thought the Trail Boss 6112 on the middle clip would be ideal if there is no obvious compatibility issue.

Thanks in advance

mvinyard · July 7, 2021

On 4/15/2021 at 3:10 PM, GK Hill said:

Great dampers. They really soak up bumps and take all mush out of the ride. Sucks they are on back order.

I set the 6112s on slot 2 which is .40”

Then I added the N35 Deaver mini pack. Now I will go up to slot 3 or 4. I don’t want to go a full 2” without new front 1/2 shafts.

damn 90 out photos smh.

How much lift in the rear did you get from the Deaver mini pack?

Ioniq MPG · July 12, 2021

On 7/7/2021 at 11:52 AM, mvinyard said:

How much lift in the rear did you get from the Deaver mini pack?

1"-1.25" total rear lift.

1/2 tank of fuel before 37.5" driver side 37.25" passenger side. 3/4 tank of fuel after 38.5" driver side 38.25" passenger side. DEF tank was about the same before and after. Rear ride height is affected much more with cargo weight compared to stock leafs.

q-tip · July 14, 2021

On 5/20/2021 at 10:36 AM, IdahoElevation said:

Did you get the 5100s put on the back? Do you happen to have a side shot? I have a black sierra with the 2" factory lift and want to get my nose up. Thinking about the 6112s and 5100 combo.

Flyboygt · July 16, 2021

So I went with the Zone lift level with control arms and 35s on method wheels on a trail boss and what I'm experiencing now is what I would call an "anxious" or "jittery" suspension. Very bouncy/jittery over bumps and very anxious to spring back.

I'm assuming the Ranchos are not that great so I've been looking into this 6112/5160 setup.

I assume everyone with lifted wheels and tires notice significant smoother ride quality with the bilsteins?

Roo Barton · January 4, 2022

I just ordered the 6112’s for my LT 4x4 today. Super excited to install them. I will be removing my leveling blocks and swapping. For the rear I have the Helwig swaybar and the Road Master Active suspension (RAD) the heavy duty version, new shocks for rear are next. The RAD lifts the rear by 1-1/2” by pulling the leaf springs together. Gonna add a 1” block to keep a rake because I haul often. I absolutely love them! Just wanted to share because I see you guys mentioning blocks etc. to lift the rear so often. I don’t think many people know about the RAD kits, but they are amazing. My opinion of course. Better than air bags.

Edited January 4, 2022 by Roo Barton

Gocats96 · March 31, 2022

@Christopher Biggers

On 6/11/2021 at 9:45 AM, Christopher Biggers said:

I am new to the site but have been lurking for a while.

I see that Bilstein offers two different part numbers of the 6112 for the T1 Silverado, 47-293557 for non-Trail Boss and 47-309524 for the Trail Boss.

Does anyone know if the Trail Boss version is longer to begin with or if it just has higher c-clip ? Do they use the same spring rate? Does anyone know why it doesn't show as being compatible with the Sierra AT4 Duramax?

I have a 2020 RST Duramax and am trying to lift 2.5-3" in the front and thought the Trail Boss 6112 on the middle clip would be ideal if there is no obvious compatibility issue.

Thanks in advance

Did you ever find an answer to this?

Gocats96 · March 31, 2022

On 4/15/2021 at 9:41 PM, Duramax3oh said:

Thank you. Set at full 2.0” lift for the 3.0 diesel. I also added a rear block to maintain about 1.0-1.5” rake. It surprisingly looks level but there’s still a rake and I have some wood and deer corn in the back. I have not noticed any sag yet

What size rear block did you use?

Christopher Biggers · October 25, 2022

On 3/31/2022 at 9:49 AM, Gocats96 said:

@Christopher Biggers

Did you ever find an answer to this?

I have not seen an answer for what the physical differences between the two 6112 part numbers. However, I went ahead and ordered the 47-309524 back in March and may some day receive them. I hear some are finally starting to come in from the nation wide backorder. Has anyone received 6112s recently? When did you order them and who did you order from?

My overall build plan for my 2020 RST Duramax is to use the 47-309524 set on the middle clip with the Bilstein control arms and trail boss axels up front. Out back 2" block with 5100s. My original GY Fortitude HTs were shot at 42k so just replaced them with General Grabber ATXs 275/70R18(SL). Eventually when everything is installed, I will get measurements and pictures posted.

Rwayne · January 4, 2023

I really like my rough country 2" leveling struts and rough country v2 rear shocks with 1" blocks on my 2013 sierra. I haven't noticed any drop(although i didnt measure).

I've got a 2019 Sierra now and the stock ride isnt near as nice. I was looking to do the same upgrade, but this thread has me questioning it. Is it really worth the added cost?

Edited January 4, 2023 by Rwayne