Jump to content

OEM specified ride height.

Ronjon
 Share

Recommended Posts

Ronjon Enthusiast

Ronjon

Posted
Posted

Does anyone have the OEM specifications for the factory ride height? Bottom of the fender to center hub. Different engine weights may cause sag or to sit higher than others. It'd be nice if the stock and max (4") measurements by the manufacturer were easier to obtain.

A lot of Coilover lifts are adjustable and I don't want to exceed a 3" lift in the front.

Amcguy1970 Enthusiast

Amcguy1970

Posted
Posted
21 minutes ago, Ronjon said:

Does anyone have the OEM specifications for the factory ride height? Bottom of the fender to center hub. Different engine weights may cause sag or to sit higher than others. It'd be nice if the stock and max (4") measurements by the manufacturer were easier to obtain.

A lot of Coilover lifts are adjustable and I don't want to exceed a 3" lift in the front.

 

You really shouldn't exceed 2", those stacking kits north of 2" are hit or miss having problems. 

 

Tyler

  • Thanks 1
Ronjon Enthusiast

Ronjon

Posted
  • Author
Posted
3 minutes ago, Amcguy1970 said:

 

You really shouldn't exceed 2", those stacking kits north of 2" are hit or miss having problems. 

 

Tyler

What is a "stacking kit"? Like strut spacers? The kind that preload?

Amcguy1970 Enthusiast

Amcguy1970

Posted
Posted
On 12/18/2022 at 2:38 PM, Ronjon said:

What is a "stacking kit"? Like strut spacers? The kind that preload?

 

The Trailboss/AT4 is basically a strut leveling kit (similar to Bilstein) and that is at 2", then these guys want to sit level so they add another 1-2" on there with another kit (IE a spacer either on top or bottom); so they are over 2" and it can hit or miss cause problems. GM uses the same control arms for both a stock truck and a TB/AT4 and that is 2", anything over you are really pushing the boundaries of the front suspension. If you don't off road much at all and it is mostly for looks then chances are you will be good for a while, if you off road or tow and haul (which you shouldn't be level at that point) then you can cause front suspension issues. The TB/AT4 also includes longer CV axles btw. 

 

Point is anything over 2" whether stacking kits or a single large adjustable coil over can impact the front suspension and steering and wear out sooner, make noises or fail. 

 

Tyler

  • Like 1
newdude Senior Enthusiast

newdude

Posted
Posted (edited)
On 12/18/2022 at 3:11 PM, Ronjon said:

Does anyone have the OEM specifications for the factory ride height? Bottom of the fender to center hub. Different engine weights may cause sag or to sit higher than others. It'd be nice if the stock and max (4") measurements by the manufacturer were easier to obtain.

A lot of Coilover lifts are adjustable and I don't want to exceed a 3" lift in the front.

 

On 12/19/2022 at 4:50 PM, Amcguy1970 said:

 

The Trailboss/AT4 is basically a strut leveling kit (similar to Bilstein) and that is at 2", then these guys want to sit level so they add another 1-2" on there with another kit (IE a spacer either on top or bottom); so they are over 2" and it can hit or miss cause problems. GM uses the same control arms for both a stock truck and a TB/AT4 and that is 2", anything over you are really pushing the boundaries of the front suspension. If you don't off road much at all and it is mostly for looks then chances are you will be good for a while, if you off road or tow and haul (which you shouldn't be level at that point) then you can cause front suspension issues. The TB/AT4 also includes longer CV axles btw. 

 

Point is anything over 2" whether stacking kits or a single large adjustable coil over can impact the front suspension and steering and wear out sooner, make noises or fail. 

 

Tyler

 

 

Yep.  Any level over 2 inches on a non Trail Boss/AT4 needs arms.  Any level on a Trail Boss/AT4 needs arms.  GM has denied many a warranty on TB/AT4 for ball joint failure with leveling kits on them.

 

@Ronjon

 

As for factory ride height, it varies significantly based on the cab, 2wd or 4wd and the factory tire option installed on the truck. 

 

What configuration is your truck?  What is the OE tire size and brand if still on it?

Edited by newdude
  • Like 1
Ronjon Enthusiast

Ronjon

Posted
  • Author
Posted
23 minutes ago, newdude said:

 

@Ronjon

 

As for factory ride height, it varies significantly based on the cab, 2wd or 4wd and the factory tire option installed on the truck. 

 

What configuration is your truck?  What is the OE tire size and brand if still on it?

2020 Silverado crew cab, short bed, 3.0 Duramax, z71, 265/65r18 bright silver OEM wheels. Front wheels sit a 21.75" fender to center hub, rear wheels sit 23" fender to center hub. Measured on a level concrete surface. From what I read it seems relatively low to everyone else. When I install the coilovers next month I wanna know I did a true 3" lift in the front. Btw I have aftermarket UCA's with Moog 1 ton problem solvers going with the coils.

 

I'll attach a photo, no suspension mods have been done yet.20221203_155903.thumb.jpg.d2e7c6f11ca81d0313cc2814c5769131.jpg

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
1 hour ago, Ronjon said:

2020 Silverado crew cab, short bed, 3.0 Duramax, z71, 265/65r18 bright silver OEM wheels. Front wheels sit a 21.75" fender to center hub, rear wheels sit 23" fender to center hub. Measured on a level concrete surface. From what I read it seems relatively low to everyone else. When I install the coilovers next month I wanna know I did a true 3" lift in the front. Btw I have aftermarket UCA's with Moog 1 ton problem solvers going with the coils.

 

I'll attach a photo, no suspension mods have been done yet.

 

 

So GM measures from the ground to the bottom of the fender on the hub center line.  They call it P height for the front and R height for the rear.  

 

For a crew cab short box 4x4 non Trail Boss with P265/65R18 its 37.40 in front, plus or minus 0.55".  For the rear its 38.50 in plus or minus 0.55".  The cross height difference, so between left and right should be no more than plus or minus 0.47" front and plus or minus 0.47" rear.  

 

These should be taken with a full tank of fuel, tire pressures set to the door jamb, level as possible ground and no occupants.  

Edited by newdude
  • Like 1
  • Thanks 2
  • 1 month later...
Ronjon Enthusiast

Ronjon

Posted
  • Author
Posted

Just going to leave this snip it here from a BDS installation guide on ride heights. In case anyone come here looking for answers.

Screenshot_20230128_091722.jpg

  • Like 1
  • Thanks 1

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

    • newdude
      Lower trims ( WT, Custom, Silverado ( aka LT )

      By newdude · Posted

      HD at the moment, are kinda their own deal.  How LTZ sells on those vs on 1500, there is a difference.   They are merging most of the mid trims on 1500.  LT, RST and LTZ are replaced by one trim, Silverado.  LT and RST are a BIG portion of sales.    Bad naming choice aside, the new Silverado trim will offer the spread of options that those three trims offered.  So expect to see things like the tech package for example, and maybe memory seats.  And LT Trail Boss will now just be "Trail Boss" (formerly LT Trail Boss) but will offer content spread like the new Silverado trim will.  The press photos showed the Trail Boss (formerly LT Trail Boss) has access to Super Cruise now, which on the current truck was High Country only.        
    • dennismc
      2021 vs 2026 handling (1500 X31 Sierra)

      By dennismc · Posted

      I installed a Hellwig rear sway bar on my 21 Sierra SLT, it made a huge difference on how the truck handles, no body roll, the trucks much more planted now. Not sure of the suspension differences between the 21 and 26,  if its body roll your having a sway bar will solve it. 
    • Old Bay
      frustrating P0446 code

      By Old Bay · Posted

      So a follow up and my fix. I found in online searches the live data to look at on a scan tool to verify the fuel tank pressure sensor was working.  It showed an spec number towards the lower end of the rang, but in spec.  Then while it was running opened the gas cap and the pressure should change.  It didn't change even a tiny bit.  The data for the purge valve said it was open...never changed. So then I measured the voltages on the plug for the fuel pressure sensor and they matched what it should be.  So local car quest parts had the sensor in stock...it was a bit of a pain to remove and an even bigger one to get it to actually go back in.  It helped to unbolt the driveshaft and bungie cord away from the gas tank to give a bit more room to work. So fuel tank pressure sensor in I cleared the code, and started it up.  I went to the scan tool's live data and... Eureka! The pressure number was different and fluctuated a bit.  So took it on a short drive and pressure number varied saw the purge valve go from closed to open and back to closed.  Drove it to and from work for roughly a week plugged in the scan tool no codes.  I took it in to get tested and passed.  In my state's infinite wisdom (oops meant greed), since I pushed the test with the maximum extensions I have to take it back in by Feb '27 to 'get it back up to date', then my next test won't be until Feb '29. 
    • newdude
      loose lug nuts

      By newdude · Posted

      Any grease on the stud threads of any kind?   Wheel studs should have NOTHING on them for proper torquing and so the nuts don't back off.     Are all of the mating surfaces clean?  So wheel, rotor and hub?     We've had plenty of trucks at work with that wheel, this is a first to me.  Makes me think they've got a lube tech putting anti-seize on all the wheel studs or some kind of grease, and they need to stop doing that.  To have 11 other trucks with the same exact problem.      
    • Flynlow
      2027 Chevrolet Silverado: Official Discussion

      By Flynlow · Posted

      I was a Chevy guy for years, then switched to GMC because I liked the looks better.  I'm actually thinking I like the Chevy looks better than GMC for the first time in a lot of years.   One thing I know for certain, the new GMC dash is hideous!  Chevy wins this one!  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...