Jump to content

slow speed suspension clunking

Gthompson
 Share

Recommended Posts

SherryAT4 New Member

SherryAT4

Posted
Posted (edited)
On 3/24/2020 at 8:02 PM, Gthompson said:

Thanks, Shawn Fox. That’s interesting, going to jump into that conversation. I thought the same thing, I definitely don’t want a clunky 50+K truck. That’s insane to me. Also, considering I just traded a 2019 Trail Boss, which I would guess has the same rear diff with no clunking sound, it’s hard to believe. I’m going to post on the other thread as well. I hope this is the issue and it can be fixed, can’t imagine keeping this truck for long with it banging around from even pulling into a gas station. 

 

Also, good point about the play in the rear axle when you push on the side. I checked a brand new Denali, my old Trail Boss (that's sitting on the lot for sale), a used AT4 and a brand new AT4. They all do that, but I know my old truck didn't make this particular noise.

Help my 2020 AT4 6.2  - (my truck has the AT4  2 inch lift plus an additional 5 inch lift ) is making all sorts of dang noises . I have taken it to a local dealership twice and they can’t hear anything .  Every time they have it it sounds worse !  I am a female  I don’t know how to explain the noises . When I start it I hear a damn chirp . Then as I am going 40mph I hear a sound that sounds like a marble inside a empty Coke can .  I hear it so often I want to drive the truck off a cliff.  The dealer (out of state ) that I bought the truck from put the lift on.  It’s also a Carbon Pro .if that matters.  As I am driving I often hear a clunk - in my definition it sounds like the damn motor just fell out . Driving up a mountain sounds and feels like my truck doesn’t have enough power . I think it struggles . As I am going up a steep incline I hear that dang marble in the Coke can noise .  
Pulling up to a stop light I hear it . This is getting old .  $75k and it sounds like a dang hoopty. It has 8200 miles 

yes - it was brand new - they had to put 500 miles on it first because of the lift before I could drive it back to my state . 
I have had it at the local dealership twice .. 4 people drove it . They all hear nothing !  I  am so pissed off. This sucks because I have no clue where the noise is coming from - I say it’s the engine . I hear it when I am driving . I can hear it when the AC is on . When the radio is playing ... but no one else seems to hear it . I hear it when I am

on the passenger side . I don’t hear it as much when I sit in the back . I didn’t start hearing the Coke can noise until 4800 miles . Chirping noise I heard it around 1000 miles . The clunk noise is new after the dealership probably screwed it up more when I took it in for them to hear the Coke can noise . Can anyone help .  

 

Edited by SherryAT4
  • Replies 198
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Javier Cantu
Javier Cantu

When they re-torqued the bolts of the rear leaf springs at the dealer they were supposed to also install new rubber insets in the leaf springs. My truck was doing the same thing, after the repair the

Chad's Trail Boss
Chad's Trail Boss

So after getting nowhere with the dealer, I decided to fix the squeaking leaf spring/rear suspension myself.  I also decided to fix the squealing rear brakes myself. Here's the fix:   A

Ryguy
Ryguy

Chad thanks for that write up man, great info. Sometimes you just gotta get your hands dirty.

Posted Images

KevChev New Member

KevChev

Posted
Posted

Hey all - 

 

So I just got my SpringThings in the mail today (Monday) but, I swear, the clunking has magically gone away in the last 3-5 days. Now, it has been pretty wet here the last few days (major rain storms) so maybe the moisture has something to do with it (maybe acting like a pseudo lubricant?) but I've driven quite a bit since last week Wednesday when I initially posted and I cannot hear/feel the clunking anymore coming from the leaf springs.

 

That being said, I will not be installing the SpringThings until I hear the clunking come back (if it ever does). Could this honestly be a "breaking in" of the new truck? Again, I bought the truck brand new off the lot and it now has 500 miles on it. Either way, I'll take it. It's nice knowing I have the right parts if the clunking should come back.

Dogdad Enthusiast

Dogdad

Posted
Posted
3 minutes ago, KevChev said:

Hey all - 

 

So I just got my SpringThings in the mail today (Monday) but, I swear, the clunking has magically gone away in the last 3-5 days. Now, it has been pretty wet here the last few days (major rain storms) so maybe the moisture has something to do with it (maybe acting like a pseudo lubricant?) but I've driven quite a bit since last week Wednesday when I initially posted and I cannot hear/feel the clunking anymore coming from the leaf springs.

 

That being said, I will not be installing the SpringThings until I hear the clunking come back (if it ever does). Could this honestly be a "breaking in" of the new truck? Again, I bought the truck brand new off the lot and it now has 500 miles on it. Either way, I'll take it. It's nice knowing I have the right parts if the clunking should come back.

I’m willing to bet you get the return of the clunk…mine went away with new leaf springs installed..but came back with in a week..

KevChev New Member

KevChev

Posted
Posted

Yea I've basically been waiting for it to come back the last few days...like I said, at least I'll be ready for it if/when it does return. I was kinda looking forward to doing a little tinkering on the truck too, but I guess I have to take my good fortune, even if temporary, for what it's worth.

  • 2 weeks later...
Duramax2021 Enthusiast

Duramax2021

Posted
Posted

I Hope this isnt a stupid question but when you add these rubber isolators to the leaf pack, does this change the amount if weight you can put in the back of the bed. i know the more weight you add in the bed the more the leafs compress. if you add these isolators does it not allow for the full compression

davester Senior Enthusiast

davester

Posted
Posted

No, they don't alter the weight rating of the truck.  The only difference would be, for the same load, the rear of the truck might ride slightly higher.

  • 3 weeks later...
JPN New Member

JPN

Posted
Posted

I installed the spring thing and the it did not help, still have the clunking noise. It did rain the other day and noticed that when the springs are wet the there is no clunking. 

 

WeGone Enthusiast

WeGone

Posted
Posted

Just wanted to update this.

 

I installed TheSpringThings July 2nd at the time I had about 500 miles on my Z71. They worked great completely stopped the noise.

 

Now I'm at 2700 miles and it has returned. Good thing is its not as pronounced or lets say a more subdued muffled sound. 

Backyard tech New Member

Backyard tech

Posted
Posted

Hi Newbie here.

My mother in law recently purchased a low mileage 2019 silverado.

I noticed a clunk as she pulled in my stone driveway.

Apon checking with the right rear wheel on and pushing in and pulling it back.

I felt alot of end play and heard the clunk in the axle.So much that I even saw the rotor move with the wheel.

Also checked the left side low an behold same amount of excess end play.

Headed to the dealer this week.

I see alot of posts on this issue here.

I am not a gm tech or owner.

But it appears from my inspection this is an issue in the rear differential axle end play.

Hope this may help others with the same issue 

 

 

 

swathdiver Senior Enthusiast

swathdiver

Posted
Posted
On 8/9/2021 at 10:36 PM, SherryAT4 said:

Help my 2020 AT4 6.2  - Then as I am going 40mph I hear a sound that sounds like a marble inside a empty Coke can .  I hear it so often I want to drive the truck off a cliff.  ...in my definition it sounds like the damn motor just fell out . Driving up a mountain sounds and feels like my truck doesn’t have enough power . I think it struggles . As I am going up a steep incline I hear that dang marble in the Coke can noise .  

 

What kind of gasoline are you using in this truck?

Roy V Enthusiast

Roy V

Posted
Posted

My 2020 2500hd is doing the same thing when going over bumps like when going over a speed bump on an angle. Thought it was the spare or something above it. If you get the truck rocking from side to side by pushing on the side of the bumper ( you really have to get the sidewalls of the tires flexing)it will make the noise. (It’s not the axel end play click, it’s a deep, inside the rear clunk.)When lying under the back of the truck while someone rocks it side to side, it feels and sounds like it is coming from inside the rear. I have 17568 mi on it. It made the noise a little when new but is getting worse after 1 year of driving.This truck has never hauled or towed anything.

jennifer fox Enthusiast

jennifer fox

Posted
Posted
On 3/23/2020 at 11:40 AM, Chad's Trail Boss said:

My stealer looked at mine last week and said the inserts were the correct ones.
Said they cleaned between the leafs real good and it fixed the problem.
This weekend the problem returned.
I have Air Lift bags on the rear of my truck and they are giving me hell saying the bags are causing this issue.
I’ve added lots of air, taken all the air out, and had the pressure up to about 12 psi and various ranges in between and it will still squeak.
Every damn time I bring it in it’s not hardly doing it. I’ve found when it rains or there’s just a lot of moisture in the air, the springs tend to not squeak or not squeak that bad. I keep videoing when it’s bad but I guess that’s not good enough for them.
I’m sick of dealing with this ****** and ready to just fix the ****** myself.
They say I’ve technically voided my warranty because I’ve modified the rear suspension. SMDH
Screw it. I might as well go ahead and lift it more now.
My rear brakes keep squealing intermittently too and I’ve have videos of that as well.

I'm about done with my dealership as well. I'm capable of doing my own repairs within reason. I'm learning everyday.  They have cost me over $2000 on unnecessary repairs and gave me crap about a recall fix I needed. I mean seriously? It's a recall! I put a 2.5 leveling kit on and apparently that causes every issue I have including recall ones. My warranty ran out a long time ago. 

Roy V Enthusiast

Roy V

Posted
Posted

Dealer just told me they had two others come in for the same thing. One truck had the spring pack replaced and the noise came right back so their trying it again. The other one is coming in for the first spring change. Service advisor and the tech both said to me that this is not a fix for the problem and I agreed that changing the springs is a disservice to the vehicle. We talked about how grease is not to be used on leaf springs ever. Even though the TSB says to grease the pads between the spring pads. He said my idea of dry lube with Teflon or anti seize or molybdenum would be a better choice and last longer and not collect dirt like grease. I’ll post the results after I do it. If the noise goes away, I’ll know it’s not inside the rear.

gerry Enthusiast

gerry

Posted
Posted

I have a 2021 Sierra 1500 SLT with the X31 package and Z71 off road suspension.   It has 700 miles on it.    The clunk is like many descriptions here, lateral over a speed bump at 3 mph and its clunk, clunk.   It does sound like the spare tire is loose.... good analogy.

Local dealer says leave it for a couple of days and they see if they can diagnose it.   

 

TSB 19-NA-129 is the requisite TSB for this.   

https://static.nhtsa.gov/odi/tsbs/2020/MC-10174269-9999.pdf



 

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.3k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,725
    Total Members
    8,960
    Most Online
    Griffin Donovan
    Newest Member
    Griffin Donovan
    Joined

  • Who's Online   4 Members, 0 Anonymous, 808 Guests (See full list)

  • Latest Articles

  • Posts

    • davester
      Anyone had to replace their Onstar module a.k.a. Telematics unit?

      By davester · Posted

      Hasn't come up in the 3 gm forums I follow. And only gm knows the frequency of failure of that part. LMG, you want a recall so it's replaced for free...
    • newdude
      Transmission Woes :-(

      By newdude · Posted

      You need a better code reader/scanner.  You are missing codes.  Did the dealer give you a copy of the SAVI scan from that visit?     If the fluid hasn't been changed, change it.  Shudder will likely go away.  
    • newdude
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By newdude · Posted

      TLDR to my other post...   Hard. Pass.  Too many what ifs.     Are you set on a 3.0 Duramax?  Have you considered anything not GM just in case?  If you don't have to have a pickup, lots of other options for $27,000 out there.   
    • newdude
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By newdude · Posted

      I see some red flags.   - No mention in the Carfax if the oil pump belt was changed.  LM2s had a 150,000mi service interval, and its got 164,245mi on it.  So right out the gate it needs about $3000-3500 for that to be done before driving it another 150,000mi.  Belt is at the rear of the engine.     - If something happens to the transmission valve body, the special coverage is expired by mileage.  That will likely be an out of pocket expense, with zero or near zero GM participation if something happened even though its in by time.   - 2020 LM2s seem to need timing chains after 80,000mi at some point.  They fixed this end of 2020/starting 2021 model year engines.  They will usually set a P0016 I think?  There is another $8000-10,000 if it needs a chain.  The main chain is at the back, secondary at the front so the pump belt would be done at the same time if it needed chains.     - Long oil change intervals.  7,000-8,000mi on average, probably close to 0% or perhaps to or beyond 0% on the OLM.  Lots of them not at the dealer which makes me wonder how much of the oil ran through that truck was the proper Dexos D rated 0w20 oil and not just gas engine 0w20, which is not the same at all.     - Long fuel filter changes, again likely taking the fuel filter life to 0% or more.  First one went 28,603, second was done 43,094 miles later at 71,697, from there another 46,452mi to 118,149mi, and then the most recent one 37,026mi later at 155,175mi.  So counting its original fuel filter, its had only 4 fuel filters on it.  No bueno IMO.         Good news?    - It has had only two warranty trips to the dealer.  The first free service (end of December 2020 on the Carfax), and the transmission reprogram recall (end of August 2025 on the Carfax).     - Truck did a LOT of moving, so that might explain the lack of emissions related repairs like bad NOX sensors, bad exhaust temp sensors, bad glow plugs, etc.         The "emissions system checked" could just be how something was flagged for Carfax.  GM dealers have to do SAVI reports for warranty repair orders so they scan the truck.  So its possible that is there for that?  
    • cherryred21duramax
      Can anyone decode a VIN to determine if this truck has had emissions issues or a recall?

      By cherryred21duramax · Posted

      Thank you, @Z45!   NOTE - No all repair shop/Dealers reports to Carfax   That is my main concern.  The CARFAX looks way too clean for a 6 year old anything with 164,245 miles.  Even something known for reliability (like many Toyotas) typically has a lot more replaced, like a Nav screen, interior trim, shock/strut, or brake pads.  And surely the last set of tires (installed at ~58k miles) would be bald unless those were all highway miles.   I'm tempted to pay a local dealer to look up the VIN, but am not sure if that will be worthwhile.  Last time I did this, it was 100% useless, and I felt scammed - they noted the bumper was replaced years ago and that's it.  A 5-year old could spot the accident damage, even though nothing was on the CARFAX.   After giving the dealer a call, the truck may have a hard shift, but they have to verify with their mechanic if that's even a concern.  And I've test driven about a dozen of these now, many near Chicago, and half the trucks shift hard/odd at all throttle positions.  The ones with aftermarket lifts/larger tires shift terrible, and 3 stock trucks shifted so violently I thought the transmission valve body was going out.   At this point I'm conflicted, as I need a vehicle, and am coming up short locally.  Northern trucks in this price range tend to have either multiple owners, a lot of mods (lifts/oversized tires without re-gearing), and are generally in rougher shape.   If this truck showed up in your neighborhood for $27k and you had to purchase it sight-unseen, with the possibility of needing a 10L80 rebuild, torque converter, or rear end - would you do it?  I'm convinced most of the 10L80 trucks I test drove are broken, they can't all shift so bad, with massive flares/slipping/lurching and mis-matched downshifts like a teen driver learning stick.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...