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Rear end clunk on AT4 HD


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Anyone experiencing a rear clunk when in reverse and at low speeds? At first I figured it's normal for a empty HD truck but the more I search I more I feel like that's not the issue. There is a thread regarding a similar issue on the 1500's: https://www.gm-trucks.com/forums/topic/236724-slow-speed-suspension-clunking/

 

Thinking about bringing it in for a look but not sure if it's normal.

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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. 

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  • 4 weeks later...
  • 11 months later...

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.

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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.
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  • 2 weeks later...
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!

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  • 1 month later...

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
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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
 

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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? 

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