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Rear end clunk on AT4 HD

souper
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newdude
newdude

First Pass: 74 lb ft Second Pass: Loosen 270 degrees Third Pass: 74 lb ft Final Pass: 175 - 185 degrees

Mass2500HD
Mass2500HD

I’m wondering the same thing. And my worry is that my clunk is not predictable. So I can just sense a never ending back and forth with a dealership.  I’m trying to pinpoint some spots that mine always

Pryme
Pryme

I’m sure it’s from the factory manual.    so it seems there is not an actual torque spec. Interesting that it requires the torque than lossening and retightening.    maybe she just needs

Another JR Senior Enthusiast

Another JR

Posted
Posted

2500 or 3500?  I hear a clunk when my overload springs hit the frame bumpers and start helping. I only hear it going over large bumps with a ton in the bed. Empty the overload springs never engage. Does not apply to a 2500. 

  • 4 weeks later...
Z45 Senior Enthusiast

Z45

Posted
Posted

Keep in mind that some noise is a normal characteristic of leaf spring suspensions when traveling over rough roads or bumps.

  • 11 months later...
Jamesh89 New Member

Jamesh89

Posted
Posted

I'm having the same problem on my 2020 duramax every bump little bump i hit I just spend 2k on 8 stage shocks and it's still doing it.i thought it was because it's lifted I'm going to try greasing everything I can and see it that helps. They make little pieces of rubber to go between the leaf springs idk if that will help.

GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
On 10/19/2022 at 7:52 AM, Jamesh89 said:

I'm having the same problem on my 2020 duramax every bump little bump i hit I just spend 2k on 8 stage shocks and it's still doing it.i thought it was because it's lifted I'm going to try greasing everything I can and see it that helps. They make little pieces of rubber to go between the leaf springs idk if that will help.

This is certainly not what we like to hear, Jamesh89.  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 2020 Duramax. To do so, please send an email to [email protected] with ATTN: Jamesh89/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.
 
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
 

  • 2 weeks later...
leolkfrm Enthusiast

leolkfrm

Posted
Posted
On 10/21/2022 at 4:16 PM, Another JR said:

Why is this spam bot willing to help Jamesh89 but not willing to help the OP with the same problem?  

first it is not a spam bot,

op was a year ago and maybe no one was assigned that cared

yes they have also taken an interest in my22

i have never had an issue with any of my trucks with leaf springs making noise like this, except if a leaf was broken!

  • 1 month later...
jesseh87 New Member

jesseh87

Posted
Posted (edited)

My rear suspension sounds soooo bad. Any turning or any bumps that's cause flexing or twisting of the frame the truck sounds God awful!!! I can stand on my back bumper and bounce and it sounds like a clunky, creaking p.o.s. This isn't my 7th truck but first 3/4 ton. It's been to the dealer 6 times. Through these 6 visits I've had it retorqued, inserts changed, leafsprings changed, new hardware and shackles. Nothing has fixed it. And now an engineer is telling the dealer it's normal and to stop wasting time on it! I'm behind disappointed.  Almost 80k 2022 at4 and it sounds like a bucket of nuts and bolts I'm the bed. 

Edited by jesseh87
GMCustomerService Senior Enthusiast

GMCustomerService

Posted
Posted
2 hours ago, jesseh87 said:

My rear suspension sounds soooo bad. Any turning or any bumps that's cause flexing or twisting of the frame the truck sounds God awful!!! I can stand on my back bumper and bounce and it sounds like a clunky, creaking p.o.s. This isn't my 7th truck but first 3/4 ton. It's been to the dealer 6 times. Through these 6 visits I've had it retorqued, inserts changed, leafsprings changed, new hardware and shackles. Nothing has fixed it. And now an engineer is telling the dealer it's normal and to stop wasting time on it! I'm behind disappointed.  Almost 80k 2022 at4 and it sounds like a bucket of nuts and bolts I'm the bed. 

This is certainly not what we like to hear, jesseh87.  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 truck. To do so, please send an email to [email protected] with ATTN: jesseh87/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
 

ttowntwostep Enthusiast

ttowntwostep

Posted
Posted

Just bought a 2023 2500HD AT4, 157 miles on it and it's doing the same thing.  You can rock it gently by the bed and it feels like something is loose with the axle.  Haven't taken it to the dealer yet.  The 2015 GMC I traded in was still solid as a rock after 8 years.

leolkfrm Enthusiast

leolkfrm

Posted
Posted
18 hours ago, ttowntwostep said:

Just bought a 2023 2500HD AT4, 157 miles on it and it's doing the same thing.  You can rock it gently by the bed and it feels like something is loose with the axle.  Haven't taken it to the dealer yet.  The 2015 GMC I traded in was still solid as a rock after 8 years.

was it undercoated or oiled? 

Mass2500HD Enthusiast

Mass2500HD

Posted
Posted

I’m having exact same issue w a 2023 Silverado 2500. Slow speed suspension rock or slightly cambered turns, same thing, under carriage clunks.  I have 500 miles, jumped on here to see if anyone else had same things before I start fighting the dealer. 

Bbfc1988 New Member

Bbfc1988

Posted
Posted

Just bought a 2023 3500 and it’s does the same thing.  Just turned 1000 miles. Didn’t notice it when I picked it up only the last 200 miles.  Any info would be much appreciated.  

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