Jump to content

Recommended Posts

Posted (edited)

For all of the posters here........   an interesting find coming from a Former Ford Guy regarding truck shaking problems :

 

MrBullz

  • New Member
  • MrBullz
  • Member
  • 1
  • 2 posts
  • Name:Austin
  • Location:Huntsville AL
  • Drives:2019 GMC Silverado SLE
3 hours ago, econometrics said:

Welcome to the GM world! 

 

Curious what you didn’t like about your new F-150? 

 

Nice color, too! ??

Long story short, I bought a brand new 18 last September and it was bought back after spending 4 months at the dealership with a problem they couldn't diagnose.  It would shake violently with a trailer hooked to it.  After receiving a replacement it vibrated so bad that the dash shook.  The same dealer told me it was a "normal characteristic" and talked to me like i was a complete idiot.  That was the final straw.  Drove it directly to GMC and they hooked me up with a decent deal and the incentives negated the negative equity.  Much better truck for the same money.  Smoother transmission, smoother ride and comparable power.  I miss the immediate power from the turbos but comfort makes it work out just fine. 

Edited by Sierra Dan
  • 2 weeks later...
Posted

Mine is back in the shop again..  Vibration, shudder while lightly accelerating and a clunk in the rear end..

 

The guys who are buying axles and driveshafts... You have to be out of warranty, right?

Posted
17 hours ago, Bcart944 said:

Mine is back in the shop again..  Vibration, shudder while lightly accelerating and a clunk in the rear end..

 

The guys who are buying axles and driveshafts... You have to be out of warranty, right?

It's your vehicle, you can do whatever you want to it. They may decide to deny a warranty claim for a failure if an aftermarket part can be shown to have caused the failure.

Now, if you replace the driveshaft, and your stereo conks out, they would have a hard time proving that the driveshaft caused the stereo to die. This is part of the Magnuson-Moss warranty act.

However, they might be able to prove that an aftermarket driveshaft caused transmission output shaft seal failure for example.

It's up to you if you want to go the aftermarket route.

Posted (edited)
6 hours ago, rpoffen said:

It's your vehicle, you can do whatever you want to it. They may decide to deny a warranty claim for a failure if an aftermarket part can be shown to have caused the failure.

Now, if you replace the driveshaft, and your stereo conks out, they would have a hard time proving that the driveshaft caused the stereo to die. This is part of the Magnuson-Moss warranty act.

However, they might be able to prove that an aftermarket driveshaft caused transmission output shaft seal failure for example.

It's up to you if you want to go the aftermarket route.

I definitely won't be doing ANY troubleshooting myself.  I didn't buy a brand new truck to work on it and figure out what engineers should have figured out long before.  

 

I'm a mechanic for another brand and kinda have an idea how the warranty stuff works...Every dealer is different.. It's in their discretion.    Thanks for the input. 

Edited by Bcart944
Posted

Hey, new to the forum. Definitely have the shake in my 2014 Sierra. After watching videos, good grief, made me feel better about mine. Some of those are bad.

 

Is it just a nuisance or does it hurt the vehicle long term? I can tolerate it but I worry the shake will cause other problems. Some of you who have had the shake for 100k or so I'd be interested in knowing what other complications you had. Thanks!

Posted (edited)

Just FYI, I have a 2017 Sierra Denali with 6.2L engine.

 

I had shake/shudder issues at low and high speeds.  Felt like I would randomly hit a rumble strip, even on smooth pavement.

 

The issue?

 

Transmission fluid.

 

That's right, took it to the dealership, they verified it by a ride with the service manager.  They flushed 3x and filled with a new fluid that takes the shudder/shake away.

 

Been riding smooth ever since.

 

I hope this helps.

 

https://ww7.oemdtc.com/8737/shake-and-or-shudder-during-light-throttle-acceleration-between-25-and-80-mph-40-and-128-km-h-at-a-steady-state-2015-2018-cadillac-chevrolet-gmc

 

Edited by isalas
Found relevant link
Posted
2 hours ago, isalas said:

Just FYI, I have a 2017 Sierra Denali with 6.2L engine.

 

I had shake/shudder issues at low and high speeds.  Felt like I would randomly hit a rumble strip, even on smooth pavement.

 

The issue?

 

Transmission fluid.

 

That's right, took it to the dealership, they verified it by a ride with the service manager.  They flushed 3x and filled with a new fluid that takes the shudder/shake away.

 

Been riding smooth ever since.

 

I hope this helps.

 

https://ww7.oemdtc.com/8737/shake-and-or-shudder-during-light-throttle-acceleration-between-25-and-80-mph-40-and-128-km-h-at-a-steady-state-2015-2018-cadillac-chevrolet-gmc

 

You have a 8 speed though right .? Thats a pretty common issue with them . 

Posted (edited)

I had the same issue ('16 Sierra 6.2l).  Just got it back from the flush/replace.

Edited by mcdye
Posted (edited)
On 6/13/2019 at 6:40 PM, Bcart944 said:

I definitely won't be doing ANY troubleshooting myself.  I didn't buy a brand new truck to work on it and figure out what engineers should have figured out long before.  

 

I'm a mechanic for another brand and kinda have an idea how the warranty stuff works...Every dealer is different.. It's in their discretion.    Thanks for the input. 

 

GM knows and has known for quite a while what's causing the shakes.  That is evident as the 2019s do not seem to have the dreaded shake (not that I've read or heard of anyways).  GM changed something, or, some things, in the new design.  I have no doubt GM knew what to change to get rid of the issue.  GM ….. screwing their customers.  Thank you Government Motors for biting the hands that feed you.  You suck.

Edited by Willyone
Posted

Those of you who have replaced your driveshafts, which one did you go with? Easy install? I'm probably going to have mine checked and see if it can be tinkered with if needed. But I'm already going down the replacement path. Thanks!

Posted

I have read there’s a class action suit working it’s way through the system for 2014 - 2018 eight speed tranny’s.  So, I would be cautious about doing DIY work for awhile.

 

btw, I had the tranny flush per the new SB with the new Mobile 1 Blue Stripe ATF. My issue was hard shifts in the lower gears.  So far seems to have fixed the problem. ?

Posted
13 minutes ago, bowtiemark said:

ok yeah guys this is extremely hard to explain online but the best thing i got is a video, please watch it and anything helps my tranny temp is normal tire pressure normal engine feels normal when stepping on it but it’s just when i cruise like around 30-50ish i hear it 

thanks anything helps! taking it to dealership ASAP while warranty is stillgood https://youtu.be/raDVKR_fcxo

 

Posted

SOLVED FOR ME: I have a 2014 Silverado 5.3L LTZ and I have the stupid shake issue like so many of you. Oddly enough, I also have weird shifting like clonks which the US class action lawsuit only mentions 8 speeds when i have a 6. I road forced balanced the wheels\Tires and I have 3 sets of wheels so I know the vibration was not caused by one set. I tried tightening the leaf springs and it reduced the vibration but made the ride stiffer at lower speed. 

 

The solution for me was adding a AFM disabler from Range technology. The vibration is gone and the transmission shifting is now smooth. It's only been one day and I am so happy, that I wanted to share.

 

I do love the GMC Sierra AT4 with a 10sp but don't need the 6.2L so the rumors that 2020 Sierra\Silverado 5.3L will come with the 10sp is great.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Latest Articles

  • Posts

    • Got part #s of what you ordered vs what you got?  
    • You have to have the last word. 
    • I am sure that was quite the pass experience and not a great place to experience during the winter when the conditions are not good. I've seen video of that pass and also more detailed information and pictures about the wrecks at that one hair pin turn where tractor trailers have flown right off the cliff and I am sure from all the warning signs that you know the exact curve that was !. After all there is a reason why a song was made about Wolf Creek Pass !. By the way and I didn't realize this either when I bought my truck as its nothing I even thought of that would be programmed into the cruise control and this occurs in either the basic or the more advanced cruise that controls your distance behind a vehicle and that is the brakes going down a hill are being applied as soon as the vehicle goes a certain speed over the set cruise speed. While it certainly does force downshifts in the transmission as you found out with cruise on while going down hill, its also dragging the brakes as needed to keep the speed controlled to what the cruise was set to. For me, I find that unsettling simply because I have no concept then as to how MUCH brake input is being used a and just how hot are those brakes getting and the wear factor as well. I can see that system getting a person into trouble on long mountain grades while pulling a trailer as it would not only be standing on the brakes of the pickup without any driver input, it would also be automatically applying the trailer brakes and it could cause a run away unit by overheating the brakes. Its one thing on a shorter hill and if the driver allows it to do its thing but on a long mountain grade is where things could get so out of hand. As someone a while back on this forum said, they had someone following them at night I believe on a down grade and had the cruise set and the person behind them could see the brake lights being energized all the way down the hill. I figured when I saw your comment that you didn't know and would have no way of knowing that your truck was applying the brakes and that you would and rightfully so assume you only used the brakes when you pressed on the pedal to slow down more than the cruise set speed for the slower sharp curves. So its good knowledge to know this about the newer GM trucks, certainly when doing any descending on long mountain grades. In the future try kicking off the cruise and use the the manual mode on a pass to see what that is like as I know myself when I first experienced it I thought no way can this engine be holding me back this well and tried the same hill in manual mode and sure enough the engine was revving way up and still could not hold the trucks speed down like it could in cruise mode.    Fuel mileage, that is where a really low sleek type of car can do better at higher speeds, certainly it starts sucking fuel too but a tall pickup is pushing massive amounts of air and also allowing a lot more air under it and the tow mirrors as in elephant ears pushing through the wind  as well. Driving like grandpa is about as good as one can do when driving one of these if trying to get the best fuel economy they can. I bet these trucks would get the best mileage they can if driven on a freeway in Florida if not busy traffic at a sedate speed and that sea level elevation without hills, vastly different then Colorado !. 
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...