Shake or Vibration Issues

[Brianibew]

3 hours ago, Barak said:

.....My next step is continue driving and monitoring to see if any changes occur but did tell them I will be taking my cousin’s 2019 year model same exact truck on same roads to see if his exhibits the same shake/vibration at any speeds. Stay tuned! 

Having the dealer compare your K2XX vibration to a T1XX makes no sense.  They do not have the same frame. They are the next generation truck.

[GMCJOE17]

3 hours ago, Barak said:

 Basically they said that they let some air pressure out of rear tires to make ride more comfortable otherwise they feel truck is within “GM’s specs”. 

I guarantee you paid double for your truck what I paid for mine and I still wont accept the "GM SPECS" BS. If they cant correct a known and faulty product, they need to buy it back or replace it with one that is "NEW CONDITION" meaning its a fully working product with NO issues. 

 

The people who just "Deal with it" not only empower GM to not stand behind the company made issues, its also lining the pockets of every corporate monkey in the company. 

 

My 2 cents (because GM got the rest) 

 

 

[Barak]

So Brianibew, you’re saying 2018 and 2019 are not the same frame? How do we tell? The trucks body is exactly the same from interior perspective. GMCJoe17 - you are right about the price aspect. However, I am now only 1000 miles on this truck and I feel I am starting to get comfortable with it. Never owned a diesel so I want to explore everything but it’s never late to go back and tell them I am still experiencing it. Maybe it’s just me too little since I went from F250 to Denali, to mention that F250 was gas, rough, bumpy, etc.  and I only drove F250 for several months. I think time will tell too but based on what Brian says, I will have to comapre 2018 to 2018 in my case. Thanks all! 

[calvic]

4 hours ago, Barak said:

So went back in to dealership due to shake/vibration at 70-75mph speeds. They examined everything on truck including taking it for a ride prior and after and couldn’t duplicate what I told them my issue was. Basically they said that they let some air pressure out of rear tires to make ride more comfortable otherwise they feel truck is within “GM’s specs”. After our conversation they did tell me to continue monitoring and certainly let them know if it changes like gets worst. They did also say that I will feel little stiffer and possibly shaky/vibration at instances due to heavy duty truck especially being diesel etc... I do get that aspect and I told them interesting to learn that for high end expensive truck. I did indicate to them that when at 55-65mph speeds, the truck rides smooth no shakes or anything but as soon as I am on thruways/highways at 70+mph it tends to pick up. My next step is continue driving and monitoring to see if any changes occur but did tell them I will be taking my cousin’s 2019 year model same exact truck on same roads to see if his exhibits the same shake/vibration at any speeds. Stay tuned! 

Batak, I basic have the same truck only it’s a 2015. Mine is smooth as glass at all speeds.

[Barak]

So Brianibew, you’re saying 2018 and 2019 are not the same frame? How do we tell? The trucks body is exactly the same from interior perspective. GMCJoe17 - you are right about the price aspect. However, I am now only 1000 miles on this truck and I feel I am starting to get comfortable with it. Never owned a diesel so I want to explore everything but it’s never late to go back and tell them I am still experiencing it. Maybe it’s just me too little since I went from F250 to Denali, to mention that F250 was gas, rough, bumpy, etc.  and I only drove F250 for several months. I think time will tell too but based on what Brian says, I will have to comapre 2018 to 2018 in my case. Thanks all! 

[Barak]

Calvic - what brand tires does yours have?

[calvic]

I have Michelin  ATX A/T2.  Stock tires that came on truck.

[Barak]

Well that’s great. I have Goodyear Wrangler SR-A which came stock and I haven’t heard much positive about them. I still feel that the vibration is due to balancing, I just don’t find this dealership’s techs to be as experienced as some independent tire shops that do it day-in and day-out for many years. And this forum has informed me that my stock tires are just unbalancable when it comes to road force balancing. I wish I could drive someone’s 2018 model like my just to see if anything is different/similar. 

[Brianibew]

2 hours ago, Barak said:

So Brianibew, you’re saying 2018 and 2019 are not the same frame? How do we tell? The trucks body is exactly the same from interior perspective. GMCJoe17 - you are right about the price aspect. However, I am now only 1000 miles on this truck and I feel I am starting to get comfortable with it. Never owned a diesel so I want to explore everything but it’s never late to go back and tell them I am still experiencing it. Maybe it’s just me too little since I went from F250 to Denali, to mention that F250 was gas, rough, bumpy, etc.  and I only drove F250 for several months. I think time will tell too but based on what Brian says, I will have to comapre 2018 to 2018 in my case. Thanks all! 

Now reading you are referring to a diesel, I assume you have a 2500?  I was talking about the half tons.

Edited October 9, 2018 by Brianibew

[abominable z71]

I haven't been on this site for quite some time so I apologize for lengthy post,  I was hoping that this thread was pretty much dead and someone had found the fix for the dreaded Chevy Shake.  I'm sad to see that's not the case.  I gave up after countless hours and thousands of dollars, I replaced damn near everything underneath the truck including the drive shaft even though I knew it wasn't the issue I was desperate for a fix and it was a failed hail Mary attempt.  I followed this thread from the beginning and posted quite a bit while I was in deep trying to find a fix it this was about the same time Jesse Davidson was fighting for a buy back and traded a brand new Denali in for an F-150 at that point several competing dealerships knew about the vibration issue and were offering pennies on the dollar to trade or flat out refusing to take a GM trade in.  Basically a few trucks got fixed with tires a few with shocks a few with drive lines and a few new rear ends or swapping the factory axle shafts for a set of Yukons but they are the exceptions and the majority have an inherent design flaw that is causing a third order harmonic vibration.  Generally nth order vibrations are weak and absorbed by the mass of the machine/structure but when the input frequency matches the natural frequency of the machine/structure you have resonance and the vibration is magnified.   So here we are with another batch of consumers trying to find a fix for a problem that a fix doesn't exist and GM barely acknowledges that a problem exists I'm sure many people have been told that your truck is "operating within the GM specification for NVH" an abitrary number that didn't exist until this issue did, I feel for you guys I really do I have been there.  For anyone still trying to fix their truck because the cost to get out of it is too high, you first need to determine the frequency of the vibration you're feeling at a given speed.  At 70 MPH a 12.5 +/- hz is a first order tire and probably a balance or runout issue.  Multiply that by your rear end ratio say a 3.42 which is roughly 43+/- hz this would be a drive line that has a balance or run out issue.  Now the 38+/- HZ this is a third order tire and this is the thus far unfixable chevy shake.  The problem is that at 70 mph nothing on the truck is rotating at that angular velocity that's how you know it's a harmonic of the tire speed and there's a whole slew of parts rotating at the same angular velocity as the tires, harmonics are never a balance issue.

 

My story; I wanted out of the truck for quite a while but wasn't willing to take the financial hit, gave up trying to fix it and just dealt with it.  Vibrated like clockwork at 68 MPH plus.  I drive a lot of California freeway, speed limit is 70 on most stretches, afters 3 years I had 70k miles on the truck and the vibration had gotten worse, to the point I loathed the truck.  Add in the new issues that were popping up, leaking passenger side door seal, failed AC condenser, premature brake pad failure, the slide pins had stuck and were not allowing the inside brake pads to retract, outer pads had 60% left on them and inner pads were almost down to the rivets, return springs on the rear brakes were hitting the rotors making an awful screeching noise even though they still had about 60% of the pad left, failed navigation module, lower seat cushion would shift during turns and make a clicking sound,  last but not least the paint was peeling off of the rear drivers side door due to bad prep, you could see the imperfections in the primer coat that were causing bubbles in the base coat.  Enough was finally enough and I decided I was trading out regardless of the financial hit.  Turns out I got a trade offer that was beyond my wildest dreams and jumped ship to a competitor (I'm intentionally not mentioning the brand to spare the haters the need to mention all the issues I'm going to have with  __________ <---enter brand here) because they know a guy that bought one and the truck went rogue and castrated him in his sleep, then murdered his family exploded and burned the whole house to the ground.  The fact of the matter all mfg's have their issues and all have their fanbois that will defend their brand to the death.  I'll take my chances with another manufacture having issues and trying to fix them versus giving GM my money and having an issue that they haven't corrected in 5 years of production and barely acknowledge.  Loyalty is earned not given and GM has done nothing in its history to earn anyone's loyalty, the few on here who have gotten buy backs had to fight tooth and nail to get them and even then GM tried to screw them.

 

To anyone reading this that has the dreaded shake.  I feel for you and if you find yourself driving at those speeds often ask yourself what your sanity is worth and just dump the POS if you can with the new GM platform out now you can bet there is no attention being paid to this issue from GM.  Their customer care hotline is a joke don't waste your time, I was told they were working on it an anticipated a fix in a few months, over 3 years later and nothing.

[Snoringbear]

Off topic a bit;  but, I’ll post anyway.  Apparently, Trump is going to allow E15 gas to be sold everywhere.   Wondering how this will affect 6.2L engines.  I believe they’re only rated for E10 gas.

[Barak]

Brianibew - yes my is Duramax Denali HD which is same as Duramax 2500 HD. I did see that Sierra 1500s was the trucks mostly affected but after I watched a you tube video of a post with 1500 Sierra and bottle of water shaking in center counsel, I started getting nervous about my truck, however, I had since tested a bottle and sunglasses in my and there is nothing compared to what I saw in you tube video post. My is generally coming from rear end and I still feel just poor balancing and/or the fact that lots have posted about goodyear wranglers not being able to road force balance. I just got 1100 miles on the truck and will continue to monitor but since dealership let out some air from rear tires it definitely changed the shake/vibration and it’s less now. So I would like to find out others that may have had similar case but strictly with sierra 2500/denali HDs not 1500s. Thanks!

[GMCJOE17]

 

[Barak]

Yep saw this video and my doesn’t do the same when having a bottle of water in front center console. Again it would be cool to get in a truck that also vibrates to really compare and determine ifan issue exists. 

[GMCJOE17]

Very happy to report I received a call from the service manager today, they really did send the data to GM and GM told them to go ahead and replace the Ring and Pinion in the rear end. He said they should order and have the parts in and installed by early next week. This is great news and means they are still actively chasing the trouble. Way to go! my Chevy Dealer for keeping the promise of correcting this issue. I really hope this corrects it!