Jump to content

2” lift questions

mxskater25
 Share

Recommended Posts

mxskater25 Enthusiast

mxskater25

Posted
Posted

I purchased a new 26 SLT with the X31 package.  I was gonna go the factory 2” lift route, but the parts rep told me GM discontinued it.  My question is, if I buy the AT4 lengthed billstein 5100 shocks and a 2” block for the rear, Would that result in a net of 2” all around? On Reddit there’s some debate about still needing a 2” Spacer in the front or not. 

  • Like 1
SC4R3C120W Enthusiast

SC4R3C120W

Posted
Posted (edited)

I looked at my app and went to accessories and confirmed it did not show up for my 26 RST either. I've been debating a lot lately about going back to a rough country kit like I had on my 2020, or spending twice as much on the dealer trail boss kit, but knowing it would be warrantied (knowing they couldn't make BS class against another lift). I guess I'll be going aftermarket. I was also slightly concerned about the front half shafts. I don't know if they are still using different ones for the trail bosses compared to other 4x4. Mine is an RST, but also Z71. I have the full metal leaf springs this time, where as my last 2020 RST had the composite.

 

for your question:  if I buy the AT4 lengthed billstein 5100 shocks and a 2” block for the rear, Would that result in a net of 2” all around?

 

you would definitely get 2" rear. As for the front, my last truck being diesel had a lot of weight in the front. My 3" lift did not gain me 3", a little less. Some lift kits now typically have slightly more in the front in order to have it leveled, where others give you same front and back and you'll have a rake to it. do your research and think about what you want

Edited by SC4R3C120W
newdude Senior Enthusiast

newdude

Posted
Posted
On 1/3/2026 at 5:42 PM, mxskater25 said:

I purchased a new 26 SLT with the X31 package.  I was gonna go the factory 2” lift route, but the parts rep told me GM discontinued it.  My question is, if I buy the AT4 lengthed billstein 5100 shocks and a 2” block for the rear, Would that result in a net of 2” all around? On Reddit there’s some debate about still needing a 2” Spacer in the front or not. 

 

 

Does not show as discontinued in GM's system, just that there is no inventory.  85727269.

bluemonstercali Enthusiast

bluemonstercali

Posted
Posted

Yes you will need the 2" block but it also depends on the final rake you will like. 2" block would gain the factory trail boss look including rake. 

  • 2 months later...
s10dragracer888 Enthusiast

s10dragracer888

Posted
Posted (edited)
On 1/3/2026 at 5:42 PM, mxskater25 said:

I purchased a new 26 SLT with the X31 package.  I was gonna go the factory 2” lift route, but the parts rep told me GM discontinued it.  My question is, if I buy the AT4 lengthed billstein 5100 shocks and a 2” block for the rear, Would that result in a net of 2” all around? On Reddit there’s some debate about still needing a 2” Spacer in the front or not. 

Hey boss, just wanted you know I recently did this with my 2024 w/t 1500. If you use a 1” shackle in the rear with trail boss struts up front, it sits level. I’ll send comparison photos. Also keep in mind, I went from 255/70R17 tires to a new set of wheels and 275/70R18’s to match the ZR2.

 

the factory ranchos are super spongy and a lot like the shocks that came on the Silverados that didn’t have special packages. I had a set that wore out completely at 25,000 miles. Skip the ranchos and get the Bilsteins. You’ll save money and get a better, longer lasting product. 
 

the 2” lift also comes with CV axles. YOU DO NOT NEED THESE if and ONLY IF you are just going with the 2” lift. If you go any higher in the front, you need the CV’s AND upgraded upper control arms.

IMG_2102.jpeg

IMG_2107.jpeg
 

PLEASE keep in mind, I swapped the grille, added the side step bars, rear fender liners, removed the air deflector on the bottom of the front bumper, and downgraded license plates to avoid paying the government more money than they absolutely have to have…..but I promise it’s the same truck. There is more than a year’s difference between these two photos.

Edited by s10dragracer888
  • Like 1
s10dragracer888 Enthusiast

s10dragracer888

Posted
Posted
On 1/10/2026 at 3:10 PM, bluemonstercali said:

Yes you will need the 2" block but it also depends on the final rake you will like. 2" block would gain the factory trail boss look including rake. 

I used a 1” shackle with urethane bushings and grease fittings for a level look. I love it. The new Falken Wildpeaks ride better than the duratracs I had on the last one from factory.

  • 3 weeks later...
buckshot85 New Member

buckshot85

Posted
Posted (edited)

Did you guys that added a 2” up front add the longer TB sway bar links?

 

I have a ‘24 1500 Z71 4wd that I’d like to bump up 2”. Possibly go 2.6” in the front. I have new UCAs. 
I have a fiberglass topper so I’m going 2” front and rear. It has about 11/16” rake so it’s fairly level. 

Any correct part numbers for the TB axles?

 

It seems sketchy to not swap them knowing Chevy added longer ones to the TB. 

Now I’ve heard that they are a little longer but more importantly is that they handle higher articulation angles. But can’t confirm. 

Edited by buckshot85
  • Like 1
s10dragracer888 Enthusiast

s10dragracer888

Posted
Posted (edited)
13 hours ago, buckshot85 said:

Did you guys that added a 2” up front add the longer TB sway bar links?

 

I have a ‘24 1500 Z71 4wd that I’d like to bump up 2”. Possibly go 2.6” in the front. I have new UCAs. 
I have a fiberglass topper so I’m going 2” front and rear. It has about 11/16” rake so it’s fairly level. 

Any correct part numbers for the TB axles?

 

It seems sketchy to not swap them knowing Chevy added longer ones to the TB. 

Now I’ve heard that they are a little longer but more importantly is that they handle higher articulation angles. But can’t confirm. 

The only thing I did was the struts upfront, and it rides fine. No swaybar links necessary, no CV axles needed… Just transfer the top part of your strut, and bolt it back up to the truck. No issues. Additionally, I’ve done a little bit of offloading myself… Haven’t had anything break.

Edited by s10dragracer888
newdude Senior Enthusiast

newdude

Posted
Posted
On 3/26/2026 at 6:21 AM, s10dragracer888 said:

Hey boss, just wanted you know I recently did this with my 2024 w/t 1500. If you use a 1” shackle in the rear with trail boss struts up front, it sits level. I’ll send comparison photos. Also keep in mind, I went from 255/70R17 tires to a new set of wheels and 275/70R18’s to match the ZR2.

 

the factory ranchos are super spongy and a lot like the shocks that came on the Silverados that didn’t have special packages. I had a set that wore out completely at 25,000 miles. Skip the ranchos and get the Bilsteins. You’ll save money and get a better, longer lasting product. 
 

the 2” lift also comes with CV axles. YOU DO NOT NEED THESE if and ONLY IF you are just going with the 2” lift. If you go any higher in the front, you need the CV’s AND upgraded upper control arms.

 

 

 

 

The factory 2" kit comes with the CV axles for a reason.  Its because those CVs are installed from the factory on the Trail Boss/AT4 trucks, and are NOT installed on a regular truck.  

 

You have to install the CVs that come with the kit.  That's why they send them.  

  • Thanks 1
buckshot85 New Member

buckshot85

Posted
Posted
1 hour ago, newdude said:

 

 

The factory 2" kit comes with the CV axles for a reason.  Its because those CVs are installed from the factory on the Trail Boss/AT4 trucks, and are NOT installed on a regular truck.  

 

You have to install the CVs that come with the kit.  That's why they send them.  

Those simply pop out and back in, correct?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • CamGTP
      Gas Prices

      By CamGTP · Posted

      Paid $2.72 for E85 today.
    • Atlas
      Gas Prices

      By Atlas · Posted

      Welcome back! No, it definitely doesn't pass the sniff test. Even "ceasefire" needs an alternative definition these days.    $5.29 at Kroger today
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That makes sense, and I think you are describing the real product problem. Capturing data is the easy part. If the owner or technician has to manually dig through five minutes of millisecond-level logs, the product has already failed. The device would be at the ECM harness, not at the OBD port, so I agree that data retrieval and event marking need to be thought through carefully. The way I am thinking about the architecture is: The recorder itself should not depend on a phone, app, Bluetooth, Wi-Fi, or cloud connection to capture the event. It should always keep a local rolling buffer and lock the event locally. A button, phone app, or small cabin device would only act as an event marker. If the driver feels a stumble and presses the button 10–30 seconds later, the pre-buffer has to already contain the useful data. For data retrieval, the practical options would be a sealed service USB lead, Wi-Fi download, or a phone/cabin companion device. I would not expect the owner to remove the ECM-side module or work with raw files directly. The cloud or AI side would be for interpretation, not for capturing the event. The truck may have no connection when the issue happens, so the evidence has to be saved locally first. After that, cloud processing could help decode the data, compare it against baselines, and generate a readable report. For the first version, I would keep the automatic triggers conservative and objective: driver event marker bus-off error passive voltage drop / brownout device reset FIFO or queue overflow a normally periodic message disappearing side-to-side communication mismatch, if the topology supports that For “learning normal,” I agree with your point, but I would not want to overclaim it as automatic root-cause diagnosis at first. A realistic first step would be learned baseline comparison for that specific vehicle and operating condition. For example, a value would only be compared against similar conditions: RPM range load / MAP throttle position gear / vehicle speed coolant and oil temperature battery voltage AFM/DFM state, if decoded and validated Then the report could flag things like: this periodic message disappeared compared with its normal timing this value deviated from this vehicle’s normal range under similar conditions the same abnormal pattern repeated after the same type of event the anomaly occurred together with voltage, oil-pressure, misfire, or communication changes But I would still call that “abnormal pattern detected,” not “replace this part,” unless there is enough validated repair data behind it. So the intended product would not be “here is a huge log.” It would need to be an event package: what triggered the capture how much pre/post data was preserved what changed before and after the event whether the device itself reset, overflowed, or saw a bus error selected graphs around the event raw data only as supporting evidence From your perspective, what would make this kind of report useful instead of just another datalog? For example: What are the top 5 parameters or events you would want highlighted first? Would you trust a learned baseline for that specific vehicle, or would you prefer fixed thresholds? How much false-positive flagging would be acceptable before you stopped looking at the reports? What would a one-page report need to show for an independent shop to take it seriously? For misfire, AFM/DFM, oil pressure, or U-code complaints, what would you want the tool to flag automatically?
    • scotthvac.net
      2022-24 halogen - led grille swap

      By scotthvac.net · Posted

      2024 Silverado 2500 HD LTZ grille no camera Parts list   84603331 84913656 84913657 84913654 84913655 84911567 84911568 85646092 85646093 85797921 85797922   11570637  x10-15   grille/bumper bolts 11546500  x10      grille clips 11571006  x10      push/retainer clips 11546454  x6       nut retainers 11611609  x6       M5 bolts 11610700  x6       molding/trim retainers
    • davester
      Replacement Radiator

      By davester · Posted

      And use RA's 5% discount code if you buy from them.  google for the code, one is always available.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...