2021 GMC AT4 3.0 Duramax -making a clacking noise and missing on acceleration?

[Blu Coburn]

My 2021 GMC Sierra AT4 with the 3.0 Duramax (55k miles) just started making a terrible clacking noise while driving (approximately 40-45MPH). I looked at my display panel and didn't see any warning lights? I pulled over & killed the engine, checked my oil -fine - and looked for anything out of the ordinary - nothing? Started it back up, the noise was still there, crawled underneath to see if I could pin point the racket, and the best way I can describe it is it sounds like there is something clacking around in the oil pan? I had to get it off the side of the road so I drove it roughly 2.5 miles to my house. While driving, I also noticed that when I accelerate , it would miss out, but gradually gain speed. Still no warning lights? Any help or guidance would be appreciated.

Edited October 25, 2023 by Blu Coburn

[Ioniq MPG]

I have heard of rod bearings giving up which caused the piston to hit the valves. Good luck.

[SVG]

Could be a bad injector. Take it to the dealership and let them fix it.

 

100K mile powertrain warranty.

[Bikerjon]

On 10/25/2023 at 9:54 AM, Blu Coburn said:

My 2021 GMC Sierra AT4 with the 3.0 Duramax (55k miles) just started making a terrible clacking noise while driving (approximately 40-45MPH). I looked at my display panel and didn't see any warning lights? I pulled over & killed the engine, checked my oil -fine - and looked for anything out of the ordinary - nothing? Started it back up, the noise was still there, crawled underneath to see if I could pin point the racket, and the best way I can describe it is it sounds like there is something clacking around in the oil pan? I had to get it off the side of the road so I drove it roughly 2.5 miles to my house. While driving, I also noticed that when I accelerate , it would miss out, but gradually gain speed. Still no warning lights? Any help or guidance would be appreciated.

What happened to your truck? Did you get it fixed?

[GMCustomerService]

On 10/25/2023 at 10:54 AM, Blu Coburn said:

My 2021 GMC Sierra AT4 with the 3.0 Duramax (55k miles) just started making a terrible clacking noise while driving (approximately 40-45MPH). I looked at my display panel and didn't see any warning lights? I pulled over & killed the engine, checked my oil -fine - and looked for anything out of the ordinary - nothing? Started it back up, the noise was still there, crawled underneath to see if I could pin point the racket, and the best way I can describe it is it sounds like there is something clacking around in the oil pan? I had to get it off the side of the road so I drove it roughly 2.5 miles to my house. While driving, I also noticed that when I accelerate , it would miss out, but gradually gain speed. Still no warning lights? Any help or guidance would be appreciated.

This is certainly not what we like to hear, Blu Coburn.  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 2021 GMC Sierra's having a clicking noise while driving. To do so, please send an email to [email protected] with ATTN: Blu Coburn/GM Trucks in the subject line.

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