2022 1500 Wheel Shake and Vibration, and Towing Issue

[Kevin0311]

Yes leaf spring U bolts, this is the thread, usefull and good read most is.  I did check my bolts on the ground using 60ft lbs setting, all rear (2 on either side) got half a turn to get to 60, fronts were all ready there using X pattern to check.  Did not plus 130 degree as seems the proper torque is 59 lbs plus 130 degrees. Wont be on interstate to try for a while yet.

I live 10 miles away from interstate where i can get up to 70 plus and doesn't seem to show any change with temps only does in/out minor vibration above 68 mph ish all the way up to the truck shuts off over 100. like a wheel weight missing but not consistent but in and out. Mine was not there brand new off the lot, picked truck up in Michigan and drove 800  miles home and few thousand more before noticed it. There was a TSB on the 14-18 and up to 20 trucks about retorquing u bolts. Worth a shot i figure. 

 

[Kevin0311]

Elimination update 3/5/24

New driveshaft no change

proper torqued U bolts no change

removed Adaptive Ride Control fuse no change as far as vibration at highway speeds

removed tonneau cover no change

Adjusted cold TP from 30-36 no change

 

I am starting to believe it is DFM related or transmission related.  Wish my truck was one of the ones without the cylinder deactivation that were produced, that would eliminate DFM and bring it to transmission.

 

 

[MrLeadFoot]

39 minutes ago, Kevin0311 said:

Elimination update 3/5/24

New driveshaft no change

proper torqued U bolts no change

removed Adaptive Ride Control fuse no change as far as vibration at highway speeds

removed tonneau cover no change

Adjusted cold TP from 30-36 no change

 

I am starting to believe it is DFM related or transmission related.  Wish my truck was one of the ones without the cylinder deactivation that were produced, that would eliminate DFM and bring it to transmission.

 

 

This is EXACTLY what I think. While, I have tried driving without DFM, by downshifting and all sorts of things, I think it actually might be a combination of things. Mine idles with a little lope sometimes, too, which I think might contribute when moving at low highway speeds, because that's kind of just off idle. But, then again, that doesn't help explain why mine runs smoothest below 60mph and once I hit 90+mph.

Edited March 5, 2024 by MrLeadFoot

[Silverado4x4]

13 hours ago, MrLeadFoot said:

This is EXACTLY what I think. While, I have tried driving without DFM, by downshifting and all sorts of things, I think it actually might be a combination of things. Mine idles with a little lope sometimes, too, which I think might contribute when moving at low highway speeds, because that's kind of just off idle. But, then again, that doesn't help explain why mine runs smoothest below 60mph and once I hit 90+mph.

Mrleadfoot I have a 2019 and I have that seems to be a vibration that starts at 60mph like turning on a switch and goes away at 80+ smooth as butter below 60mph, I have tried all the things mentioned above with no luck except drive shaft iam starting to think its wind turbulence I don't know. 

Edited March 6, 2024 by Silverado4x4

[MrLeadFoot]

4 hours ago, Silverado4x4 said:

Mrleadfoot I have a 2019 and I have that seems to be a vibration that starts at 60mph like turning on a switch and goes away at 80+ smooth as butter below 60mph, I have tried all the things mentioned above with no luck except drive shaft iam starting to think its wind turbulence I don't know. 

That's an interesting thought. Are you lifted or leveled in any way, and do you have stocks wheels and tires? I am completely stock, except I now have the 20" wheels optioned wheels I purchased later in addition to the 22" wheels that came with my truck. 

[Silverado4x4]

21 minutes ago, MrLeadFoot said:

That's an interesting thought. Are you lifted or leveled in any way, and do you have stocks wheels and tires? I am completely stock, except I now have the 20" wheels optioned wheels I purchased later in addition to the 22" wheels that came with my truck. 

Nope all stock Z71 with 18" wheels stock tires, replaced tires about 2yrs ago it made no change.

[Kevin0311]

8 or 10 speed transmission?

 

[Silverado4x4]

3 hours ago, Kevin0311 said:

8 or 10 speed transmission?

 

8 speed had the new fluid flush at about 8000 miles due to the shutter which fixed it and tranny shifts smooth since, have about 29,000 on the truck now.

[MrLeadFoot]

19 hours ago, Silverado4x4 said:

8 speed had the new fluid flush at about 8000 miles due to the shutter which fixed it and tranny shifts smooth since, have about 29,000 on the truck now.

Was the shudder different than the vibration you feel now? If so, can you please elaborate a little? I ask, because I was thinking it might be transmission related, so your feedback would be helpful. It is hard for me to believe something as simple as different fluid fixed the "Chevy Shake", and wonder if perhaps it didn't completely fix it. Or, do you think it has nothing to do with the shudder you were previously feeling?

[Silverado4x4]

16 hours ago, MrLeadFoot said:

Was the shudder different than the vibration you feel now? If so, can you please elaborate a little? I ask, because I was thinking it might be transmission related, so your feedback would be helpful. It is hard for me to believe something as simple as different fluid fixed the "Chevy Shake", and wonder if perhaps it didn't completely fix it. Or, do you think it has nothing to do with the shudder you were previously feeling?

The shutter I felt before the fluid change is not the same as now, and this is not a Trans shutter that problem is gone after the fluid change.  My wife can't feel it and it's not a vibration like unbalanced tires. If I have a pretty heavy load in the bed its not there starts at 60mph and gone at around 75 to 80mph unloaded. That's why I think it's wind turbulence. 

 

[GMCustomerService]

On 3/5/2024 at 4:12 PM, Kevin0311 said:

Elimination update 3/5/24

New driveshaft no change

proper torqued U bolts no change

removed Adaptive Ride Control fuse no change as far as vibration at highway speeds

removed tonneau cover no change

Adjusted cold TP from 30-36 no change

 

I am starting to believe it is DFM related or transmission related.  Wish my truck was one of the ones without the cylinder deactivation that were produced, that would eliminate DFM and bring it to transmission.

 

 

This is certainly not what we like to hear, Kevin0311.  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 2023 Chevrolet Silverado. To do so, please send an email to [email protected] with ATTN: Kevin0311/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
 

[MrLeadFoot]

2 hours ago, GMCustomerService said:

This is certainly not what we like to hear, Kevin0311.  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 2023 Chevrolet Silverado. To do so, please send an email to [email protected] with ATTN: Kevin0311/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
 

How come you aren't contacting me, too? I started this thread with my whole issue, and Kevin0311 has the same problem. We have both taken pains to try to rectify this, and both have spent our own money, too. So, why aren't you trying to help BOTH of us?

[Kevin0311]

last week i put original tires/wheels that the truck came with on and same vibration.  Ordered new oem rotors and they showed up yesterday will install them this weekend and check for hub runout when all apart. Drove to Bristol TN and back over the weekend 1700 miles and could find no rhyme or reason or condition to get it to change, vibration from 68-75 the worst, seems to fade some above 75 but still there. 

Rotors, hub runout (looking for bent axle) and rear diff locker next areas to look at, changed the diff fluid last week (with oem fluid and gasket) before the trip south and all looked good back there no excess metal or chipped gear, all bearings looked fine. 

 

i did have my tire guy unmount my tires from the rims and check the "true/balance" of rims and they were all out some but one was 4.5oz out of round, these are OEM GM accessory wheels.  I do not know what they should be but i would think close to true 0 but don't know, he remounted tires, rotated 180 degrees on rims from what they were and rebalanced, all balanced out with weight but roadforce was off quite a bit on all, one was a 49 with the machine showing the best it would be able to get by adjusting things again (rotating tire on rim) would be 45 others were under these numbers but upper 20's was best. All the tire info means to me is needs weights to get balanced, doesn't matter anyway as no different in any position on the truck front/rear/left/right.

I still believe something out of balance on the truck driveline and will continue searching.  Aero has crossed my mind but nothing looked out of wack when i had the truck up on my lift doing the rear diff fluid. My 2019 i owned before this never had a issue same 6.2 with 10 speed same trim.  

 

GM customer service:  I did take to my local dealer to have them look into my vibration concerns described in my posts on this forum, i was charged a fee and their diagnosis was could not duplicate customer concern, some irregular tire wear might be causing the vibration that the customer is feeling. 

 

With 5 GM vehicles currently in my garage was disappointing to get that answer and no help to fix the problem.  Trust me i know the saying if you want it done right have to do it yourself.

Edited March 19, 2024 by Kevin0311

[MrLeadFoot]

3 hours ago, Kevin0311 said:

last week i put original tires/wheels that the truck came with on and same vibration.  Ordered new oem rotors and they showed up yesterday will install them this weekend and check for hub runout when all apart. Drove to Bristol TN and back over the weekend 1700 miles and could find no rhyme or reason or condition to get it to change, vibration from 68-75 the worst, seems to fade some above 75 but still there. 

Rotors, hub runout (looking for bent axle) and rear diff locker next areas to look at, changed the diff fluid last week (with oem fluid and gasket) before the trip south and all looked good back there no excess metal or chipped gear, all bearings looked fine. 

 

i did have my tire guy unmount my tires from the rims and check the "true/balance" of rims and they were all out some but one was 4.5oz out of round, these are OEM GM accessory wheels.  I do not know what they should be but i would think close to true 0 but don't know, he remounted tires, rotated 180 degrees on rims from what they were and rebalanced, all balanced out with weight but roadforce was off quite a bit on all, one was a 49 with the machine showing the best it would be able to get by adjusting things again (rotating tire on rim) would be 45 others were under these numbers but upper 20's was best. All the tire info means to me is needs weights to get balanced, doesn't matter anyway as no different in any position on the truck front/rear/left/right.

I still believe something out of balance on the truck driveline and will continue searching.  Aero has crossed my mind but nothing looked out of wack when i had the truck up on my lift doing the rear diff fluid. My 2019 i owned before this never had a issue same 6.2 with 10 speed same trim.  

 

GM customer service:  I did take to my local dealer to have them look into my vibration concerns described in my posts on this forum, i was charged a fee and their diagnosis was could not duplicate customer concern, some irregular tire wear might be causing the vibration that the customer is feeling. 

 

With 5 GM vehicles currently in my garage was disappointing to get that answer and no help to fix the problem.  Trust me i know the saying if you want it done right have to do it yourself.

I've done the route with wheels and tires. In fact, two dealerships have put a total of 8 stock 22" rims and 12 tires on my truck, to no avail, all within two months starting when my truck had 500 miles on it. Both dealerships road forced tire after tire after tire, and replaced them all until they got as low as 17 and highest was 25, if I recall correctly. They even had a GM rep come out and run a Pico test, only to say this vibration is "normal".

 

First of all, everyone who's been involved with my truck knows there is something out of balance, which is why they got authorization to put up to 8 rims and 12 tires on the truck, and have a Pico test done. If they didn't feel what I was talking about, they wouldn't have gone through all this right from the get go, now, would they? One of the managers felt it HAS to be the 22" wheels, and suggested I try 20" wheels, because it seemed to be less noticeable when I swapped with a friend's 20" wheels on his 2020 Chevy for a test.

 

But, before I did that, under GM's suggestion, I took it to yet another dealer who checked driveshaft, brakes and runout, and found nothing wrong. 

 

So, I bit the bullet and bought brand-new 2022 stock take-off 20" wheels. While it runs smoother due to the taller profile, because they are the AT tires instead of the performance street tires that come stock on the 22" wheels, it's not really a good straight comparison, but it still vibrates with not much change. I didn't get a chance to drive it all that much with the 20" wheels because winter came and those stock tires on the 20" rims are terrible in wet weather so I put the 22" back on for winter because those tires are amazing in the wet. They handle like it's dry. 

 

It's probably my imagination, but I want to say that after putting the 22" back on, the speed at which it vibrates the most seems to have changed since I had the 22" on the truck previously. Just like you noticed, my vibration was right in the sweet spot of freeway driving, from about 64 to 78mph. I now noticed it seems to the worst at closer to 80, but at 90mph, it becomes the smoothest, just like when you have tires out of balance. Because the vibration range seems to have changed, it makes me wonder if it's not rims and tires at all, and just FEELS like a wheel vibration, and that maybe a software update has changed something that has caused the vibration to move to a different point, I don't know. Remember, I've had 8 rims and 12 tires on in the 22" size, and 4 rims and 4 tires in the 20" size, so it's hard to remember every little thing.

 

My next move is to put back on the 20" wheels in different positions to see what I find, because now I've had a real good chance to evaluate the best balanced  22" stock setup, with a short time of the 20" wheels in between. So, now I will be able to better assess if the 20" really do make a difference. I did notice before, though, that while the 20" were noticeably smoother over uneven roads, the truck bounced noticeably more and swayed way more in the corners, so I am also going to play with tire pressure this time around o the 22", too.

 

I researched the lemon law extensively, and have consulted with a lemon law attorney who is chomping at the bit for my case. I don't blame him because I think it's obvious by all the examinations they did, and the rental cars GM paid for, that GM already know there's a problem. They wouldn't have authorized all the time spent if they didn't think something was wrong with my truck. I also documented everything and had opened a case with GM corporate at 11 miles on the truck. The attorney says I have time to do whatever else more I want to try before we file the case because I'm well within the time frame to file. I don't really want to, but more and more, it's looking like I don't have a choice. It's not right to spend $80k and have to drive something that feels like it's got out of balance tires shaking down the road. 

Edited March 20, 2024 by MrLeadFoot

[Kevin0311]

where did they clamp the wires for the pico test?  Do you know what rear your truck has an AAM or GM one? GM has 3 fins on top AAM does not.

Info in this link: 

 

Mine is AAM

.5" AAM rear:

9.5" GM rear:

AAM Front:

GM Front:
 

 

Edited March 20, 2024 by Kevin0311