Jump to content

Knocking sound from rear end 21 sierra 1500

Digger87
 Share

Recommended Posts

Digger87 Enthusiast

Digger87

Posted
Posted

Just purchased a 2021 sierra 1500 Duramax. I've owned it about 5 weeks now and it was smooth and silent up until a few days ago. I'm now getting a knock/clunk coming from the rear end. It happens when I'm driving slowly going over bumps or when turning. I did some research on this forum and narrowed it down to defective leaf springs or it's the DEF sloshing around and making noise. I jumped up and down in the bed like a crazy person. The leaf springs were silent but I did hear the DEF tank although it wasn't the same sound. Could it be anything else? I'm taking it to the dealer next week but as we all know, more often than not they are absolutely horrible at diagnosing strange noises so I'd like to make some suggestions for them.

 

 

IMG_20220513_065351_1.jpg

mafd2 Senior Enthusiast

mafd2

Posted
Posted (edited)

Leaf springs and common. Shake the rear of the bed hard side to side and you'll hear it. Many have went to the dealer and ranges from spraying lube, greasing between leafs and even changing spring packs with only temporary fixes. Truck will sit at the dealer for days and most dealers say "it's normal". BS. That's a bad GM design. I had the same on my '19 RST and '22 LTZ. The only thing that works and the fix is called spring things. I just installed them on my '22. Thousands of GM truck owners use them and is the only product the company makes and for GM leaf springs. Easy install and works amazing and quiet as can be. I didn't even remove the wheels. Spring-things.com

Edited by mafd2
Digger87 Enthusiast

Digger87

Posted
  • Author
Posted
1 hour ago, mafd2 said:

Leaf springs and common. Shake the rear of the bed hard side to side and you'll hear it. Many have went to the dealer and ranges from spraying lube, greasing between leafs and even changing spring packs with only temporary fixes. Truck will sit at the dealer for days and most dealers say "it's normal". BS. That's a bad GM design. I had the same on my '19 RST and '22 LTZ. The only thing that works and the fix is called spring things. I just installed them on my '22. Thousands of GM truck owners use them and is the only product the company makes and for GM leaf springs. Easy install and works amazing and quiet as can be. I didn't even remove the wheels. Spring-things.com

Thank you! I won't bother with the dealer then. I'll order the spring things 

  • 2 weeks later...
mdviva718 New Member

mdviva718

Posted
Posted
On 5/24/2022 at 6:38 AM, Digger87 said:

Just purchased a 2021 sierra 1500 Duramax. I've owned it about 5 weeks now and it was smooth and silent up until a few days ago. I'm now getting a knock/clunk coming from the rear end. It happens when I'm driving slowly going over bumps or when turning. I did some research on this forum and narrowed it down to defective leaf springs or it's the DEF sloshing around and making noise. I jumped up and down in the bed like a crazy person. The leaf springs were silent but I did hear the DEF tank although it wasn't the same sound. Could it be anything else? I'm taking it to the dealer next week but as we all know, more often than not they are absolutely horrible at diagnosing strange noises so I'd like to make some suggestions for them.

 

 

IMG_20220513_065351_1.jpg

Hello.  I went through this with my 2021 Trail boss.  It is the rancho shocks.  Get them replaced under warranty and the problem will be gone.  A way to confirm this is to stand in the rear bumper step at each corner and bunce.  You will hear it loud and clear.   In fact I started to hear it in the front as well, and just had the passenger side shock replaced.  Solid and quiet now.  

 

Digger87 Enthusiast

Digger87

Posted
  • Author
Posted
On 6/1/2022 at 11:49 AM, mdviva718 said:

Hello.  I went through this with my 2021 Trail boss.  It is the rancho shocks.  Get them replaced under warranty and the problem will be gone.  A way to confirm this is to stand in the rear bumper step at each corner and bunce.  You will hear it loud and clear.   In fact I started to hear it in the front as well, and just had the passenger side shock replaced.  Solid and quiet now.  

 

Thank you for the suggestion but I believe the trail boss and x31 have different shocks (I could be wrong). I installed the spring things and the noise is gone so it was the leaf springs

 

Gangly Senior Enthusiast

Gangly

Posted
Posted

The TrailBoss and the X31 do have different shocks.  Glad you were able to fix your leaf spring issue 👍

  • 3 weeks later...
Kilo Enthusiast

Kilo

Posted
Posted

I have the same noise problem with my 2020 1500 Duramax 4WD. Took it to the dealer they said they can't find anything wrong. Took it back and had the service manager drive it. He said it is "bed shift". They tightened the four bolts

holding the bed to the frame. He said there is no fix for it. Problem is still there. Truck is still under warranty. Has anyone heard of Bed Shift?  I think it's BS.

 

mafd2 Senior Enthusiast

mafd2

Posted
Posted
3 minutes ago, Jack Thaxton said:

I have the same noise problem with my 2020 1500 Duramax 4WD. Took it to the dealer they said they can't find anything wrong. Took it back and had the service manager drive it. He said it is "bed shift". They tightened the four bolts

holding the bed to the frame. He said there is no fix for it. Problem is still there. Truck is still under warranty. Has anyone heard of Bed Shift?  I think it's BS.

 

Spring Things man. Quit wasting time at the dealer.

Kilo Enthusiast

Kilo

Posted
Posted

ordered them just now. Will keep you advised.

Thanks much

  • Like 1
Digger87 Enthusiast

Digger87

Posted
  • Author
Posted
2 hours ago, mafd2 said:

Spring Things man. Quit wasting time at the dealer.

Yup. These fixed my issue. Can't thank you enough for recommending them!

  • Like 1
  • 7 months later...
lightsout8502 New Member

lightsout8502

Posted
Posted

I am having this same issue.  I have a 2022 At4 duramax.  1800 miles and Everytime my rear flexes I hear a nose on the driver side.  I tried the spring thing and I still hearing noise.  Anybody have anymore suggestions?

901B2A1C-71B0-40B3-B543-E1CCAC3EBE86.jpeg

GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
On 2/6/2023 at 9:24 PM, lightsout8502 said:

I am having this same issue.  I have a 2022 At4 duramax.  1800 miles and Everytime my rear flexes I hear a nose on the driver side.  I tried the spring thing and I still hearing noise.  Anybody have anymore suggestions?

901B2A1C-71B0-40B3-B543-E1CCAC3EBE86.jpeg

This is certainly not what we like to hear, lightsout8502.  Please know, customer satisfaction is extremely important to us. Our team would be more than happy to take a closer look into the concerns with your 2022 GMC Sierra AT4 Duramax. To do so, please send an email to [email protected] with ATTN: lightsout8502/GM Trucks in the subject line.

Please include your contact information, VIN, a brief description of your concern, and the name of your preferred dealership. We look forward to hearing from you. To learn more about GM’s Privacy Policy, please visit https://www.gm.com/privacy-statement.html. The information you provide may be monitored and recorded and is subject to the GM Privacy Statement.
 
Privacy Statement | General Motors
Your privacy is important to General Motors. This Privacy Statement addresses the personal information GM collects and how GM handles that personal information.
www.gm.com

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

    • BIGBOYS
      Doors lock and mirrors fold in while driving

      By BIGBOYS · Posted

      I have a 2015 Silverado and sometimes I can not get in to the truck. I use the key to unlock the driver door. Something is locking the truck when I unlock it, last night I left the truck open and this morning it was locked with the mirrors folded in. This happens while driving so it is now a safety issue. I reach down for the folding button and they open, then they close again.  Any advice, thank you,   Ed
    • Paul8556
      Headlight issue...

      By Paul8556 · Posted

      Did you ever find a resolution to this? my 2019 Silverado 1500 is showing the exact same headlights issues with the exact same symptoms.  would help a ton if anyone has any advice on this or better yet a known solution..
    • RyanbabZ71
      Gas Prices

      By RyanbabZ71 · Posted

      Wawa and Meijer here have ethanol free (88 & 89) I use for my mower and lawn equipment.  Its not much more than reg.  I paid $3.29 a few weeks ago.  
    • Atlas
      Wow I'm in a pickle. (Broke down truck) and a story.

      By Atlas · Posted

      tl; dr I've now reached the 6th floor of hell. I'm chronicling my journey for my morning readers.   Pulling the top of the intake apart was moderately easy but it involved a lot of parts, connections, and minutae. I was preparing for the new fuel lines to arrive ("nut and bolt kit" it's called). The fuel line connections are notched and held in place by the manifold and a metal plate with a T27 screw.   It's on the back of the intake, under the firewall, with little clearance, and two hard metal fuel lines in the way. I was using Franken-tools (weird combinations of 1/4 inch ratchet with/without an extension, with a bit holder for my T27) to get in there. One of my sockets and bits fell off and has yet to emerge on the floor. I lost a second setup and that's when I almost started throwing tools. But that was the point at which I had gotten traction on the Torx head, and it promptly stripped. No more traction.   I started humming "1-877-kars-4-kids" because I was about at that point. You know what? I'm $1500 into this thing and I can make it disappear just as quickly. This isn't fun anymore. I had spent a lot of time already "tidying" around the engine bay: Fixing all the "someone's been here before!" BS. The truck has been exclusively dealer- and shop- serviced and I'm reminded of why I never let other people work on my cars unless absolutely necessary.   Speaking of dealer service. This truck has a 1" stack of records going back to 1995. I put them all in an excel spreadsheet, date/mileage/description.   The CPI spider has been replaced 4 times in 85k miles. The EGR? Another 4. Multiple, multiple O2 sensors. One Cat. 4? Sets of plugs and wires, and I swear half the stack is diagnosis paperwork for "misfire, runs rough, extended crank, dies at stoplights".   GM was producing some proper crap back then. And it was still well within the era of brittle/crappy plastic. (Windows 95 was released the same month this truck was sold new, we HAD the technology!!)   There (was) a plastic shroud around the evaporator core and HVAC fan in the engine bay. I noticed a chunk of it missing so I poked at it some more and it literally shattered. Touched it some more and pieces were crumbling off. Had a good laugh. Clearly whatever plastic garbage they were using had broken down over 30 years and was literally turning to dust. That was a good half hour of using a shop vac to remove the rest of it.   Back to it.   I was going to give up for the evening but then decided I'm already level 10 pissed off at the stripped screw: G* D* it, give me my tools back -- and my JOY. We'll do this the hard way: The whole intake is coming off.   Blazer won Round II. After finally finding and accessing the 12 intake bolts and using a pry bar to unseat it from the heads, it popped loose in an explosion of gunk and grime raining down into open ports. Awesome.   6 times I reminded myself: Be careful of the temperature sender on the front of the intake.   YEAH, I forgot again and snapped it clean off in the removal. Add another $20 to the ever-growing list of new parts this thing is consuming.   The shame is, long before removing the intake, I had changed the oil in prep for Tuesday's momentous fuel line replacement that was going to be the magic fix and I'd have a running Blazer to tool around in this next weekend. The intake removal, including raining gunk, also gushed dirty coolant all over the valley. Of course it did. Welp, there goes another $35.   I now need an intake gasket set, bolt set, coolant temp sensor, another 5 quarts of oil, some RTV. Don't worry, I've already got 3 new jugs of Dexcool and a thermostat waiting. I'll fill it with clean water first to get it running, dump it, and then add the Dex later on in case... well, let's not go there. I'm only tearing this down once, next time the truck is going on Marketplace for FREE.   Oh, and I'm going to need vacuum hose for all the stupid connections placed at the rear of the engine which have since disintegrated. Come on, GM....tell me you don't do that anymore?   Oh, and the ears on the distributor where the cap screws down are both cracked. I mean, why not put a new distributor in it too. You get a distributor, YOU get a distributor, Everyone gets a new distributor!   This truck isn't out of the woods yet...I'm already questioning how much more time I'm willing to sink in.
    • William Aldrich
      Bent valve in 2025 GMC Canyon Denali - Requires engine swap at 14K miles

      By William Aldrich · Posted

      NewDude, thank you for the suggestions!    I did follow up and the dealer indicates he has an open CX case and is working with DPAC (Dealer Parts Assistance Center).   Per the dealer, GM has had a quality spill and is not providing an update for when a replacement engine will be available.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...