Need help diagnosing noises coming from my 2020 Silverado 1500 5.3L

Sir_Griglesworth · January 5

Hello everyone. I've recently purchased a 2020 Silverado 1500 from a dealership. I found out late in the sale that the truck was used as the dealerships "loaner" which didn't really bother me even though I know people beat up those vehicles. Anyway, I'm pretty in-tune to vehicle sounds and I had a couple of questions regarding noises I'm hearing from my vehicle.

The first is a clunking noise and a physical jolt when I shift from Drive to Reverse. I have my foot on the brake and am on a flat surface. I notice it a lot after I've been driving for a while and go to back into my garage. I took the truck back to the dealership and they chalked it up to bad U-joints. They slapped 2 fresh sets on, but I've still go the issue. Any ideas what it may be? I don't feel like anything is going to fail, but I also don't like the sound and don't think it should be that way. I have another service appointment next week and I'd like to help them out with ideas considering they don't really seem to care.

The second is a ticking noise coming from the undercarriage. I' got under the truck today and believe it's coming from the rear portion of the engine, but I'm not for certain as I've never been beneath the truck while it's been on a rack. The noise cannot be heard when standing at the front with the hood up, but I can hear it very noticeably when standing at the driver's door. I do not hear it as the engine is heating up, but that could be because every other component under the hood is loud as h*ll while the truck is heating up. Once the engine is approaching operating temp, it's very noticeable. As you can hear from the short video, it's every .5 to 1 second or so and is always present during idling. Again, may not be a big issue, but I hate hearing things on my vehicles that I can't attribute to something else.

Thanks for reading my ramblings. I can try to post longer videos if anyone needs. Thanks in advance!

Transient · January 5

Tell us more about the truck, please. Engine, trans, etc

YYC-SIERRA · January 5

My 2018 truck sounds the same as your second video. just passed 60k miles since new, no issues.

Sir_Griglesworth · January 5

12 minutes ago, Transient said:

Tell us more about the truck, please. Engine, trans, etc

I'm not sure what else to share, I'm sorry. Truck has 68k on it, I've put 2.5k on it since purchasing. As I mentioned, it's a 5.3L V8. I've not yet done a tranny flush although that's on my list of things to do in order to make sure the truck is at baseline maintenance. Is there any other specific info you need?

Sir_Griglesworth · January 5

6 minutes ago, YYC-SIERRA said:

My 2018 truck sounds the same as your second video. just passed 60k miles since new, no issues.

I bought this 2020 at 65k, and I know that's kind of high mileage for such a new vehicle. Glad to hear your truck is doing well!

GMCustomerService · January 9

On 1/4/2023 at 9:20 PM, Sir_Griglesworth said:

Hello everyone. I've recently purchased a 2020 Silverado 1500 from a dealership. I found out late in the sale that the truck was used as the dealerships "loaner" which didn't really bother me even though I know people beat up those vehicles. Anyway, I'm pretty in-tune to vehicle sounds and I had a couple of questions regarding noises I'm hearing from my vehicle.

The first is a clunking noise and a physical jolt when I shift from Drive to Reverse. I have my foot on the brake and am on a flat surface. I notice it a lot after I've been driving for a while and go to back into my garage. I took the truck back to the dealership and they chalked it up to bad U-joints. They slapped 2 fresh sets on, but I've still go the issue. Any ideas what it may be? I don't feel like anything is going to fail, but I also don't like the sound and don't think it should be that way. I have another service appointment next week and I'd like to help them out with ideas considering they don't really seem to care.

The second is a ticking noise coming from the undercarriage. I' got under the truck today and believe it's coming from the rear portion of the engine, but I'm not for certain as I've never been beneath the truck while it's been on a rack. The noise cannot be heard when standing at the front with the hood up, but I can hear it very noticeably when standing at the driver's door. I do not hear it as the engine is heating up, but that could be because every other component under the hood is loud as h*ll while the truck is heating up. Once the engine is approaching operating temp, it's very noticeable. As you can hear from the short video, it's every .5 to 1 second or so and is always present during idling. Again, may not be a big issue, but I hate hearing things on my vehicles that I can't attribute to something else.

Thanks for reading my ramblings. I can try to post longer videos if anyone needs. Thanks in advance!

This is certainly not what we like to hear, Sir_Griglesworth. 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 Silverado 1500. To do so, please send an email to [email protected] with ATTN: Sir_Griglesworth/GM Trucks in the subject line.

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