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Shake or Vibration Issues

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Dire Wolf New Member

Dire Wolf

Posted
Posted

Topic is still relevant. Have an 18 Silverado Z71 LT 18 inch wheels  900 miles and am getting a slight shake in the steering wheel/front end at 70 or so mph. Off to the dealership Saturday...  We shall see.  

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csckickass
csckickass

Well folks, I did it. After all the failed attempts at the Chevy dealer I traded it in for a 2015 Ram 1500 Larame. I have to agree with the other folks on here that have done the same thing, it was th

mafd2
mafd2

Apparently you and the other customer reps don't care. If you or GM would care y'all would put more effort in the matter. Just coming on the forum and stating the same repetitive posts and being a 3

DALaws
DALaws

Well I have some good news and bad news about my truck vibrations. Good news is that my truck has a significantly less vibration at speed. The bad news is my truck has significantly less vibration. Fo

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Severado Enthusiast

Severado

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Posted

I'm going to wait until December 2019 before I buy another Silverado. I do miss my 2015 though.

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Jesse Davidson Enthusiast

Jesse Davidson

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Posted
I'm going to wait until December 2019 before I buy another Silverado. I do miss my 2015 though.

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I don’t [emoji23]


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rhino68 Enthusiast

rhino68

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Posted

Hey guys I was heavy on this topic not long ago. I left here saying I was going to swap the axles which ended up taking longer than I had wanted. Well I did. I went with an aftermarket axle and while the rear end was opened I swapped from 3.42 gears to 4.10 for my 34" tires. I did stick with AAM gear set.  RPM's on the highway now are a little higher than I wanted  but I have my power back. Anyways I still have the shake just at different speeds now. Im waiting on my updated tune from blackbear for my speedometer to be fixed. Just using gps on my phone now for speed but its approx. 10 mph off at 65mph. Once I have that I'm going to dive back into this and research some more. If vibration is still around the 74mph mark (worst vibes) in my truck then I know its nothing to do with the rotating mass or drivetrain. Now that my driveshaft is spinning faster than normal at highway speeds due to the gearing change. I still strongly believe it is in the TCM tuning inside the trans. Pulsing clutch pressures and valves and such. Blackbear has worked with me in the past and has modified a pressure value in the trans which made the vibration much less noticeable, at least for my situation.

 

Also I have switched out rear shocks, took out my 2 piece driveshaft and had it balanced and was slightly out of spec and corrected. I know it isn't the driveshaft in our trucks causing the problem as some have a 1 piece and others have 2. It doesn't matter if its 2 wheel drive or 4. Also doesn't seem to matter if you have the 6.2 or 5.3, 6 or 8-speed. 

 

Some have replaced torque converters and have had success. Some have just flushed and serviced their trans and it seems to help. I am wondering if some just get a bad batch of fluid in their trans from the factory causing pressure and slippage issues. I will be servicing the trans soon as well.

 

 

battleofone New Member

battleofone

Posted
Posted

I have 14 Sierra Denali crew cab 4wd, been battling an intermittent shake at 70 + and I don’t mean a vibration it shook like hell. Hitting bumps and entering curves at 70 + speeds would cause the truck to shake and then it would work itself out and get smooth again. I found another thread on this forum with a guy that was having vibration at 70 to 80 and he took it to the dealer and mechanic told him he knew exactly what it was, rack and pinion bushings. The guy said he had it done and it fixed most of it. So what the hell did I have to lose, ordered the bushings and replaced them, it took 80% of my shake out, now it’s still there but the damn thing is drivable without losing my mind. The part # from GM is 84234960. When I dropped my rack and pinion down I saw that it had 4 bushings and GM only sent me two, the reason for that is only two of the four are serviceable, it’s the two on the left side of the rack and pinion. I don’t know if it will help you guys out but it worked for me, good luck.

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Snoringbear Enthusiast

Snoringbear

Posted
Posted

Hey Jesse, where ya been?  Last time we chatted you were about to get out of your Ferd and get into an Audi.  Did you do that and if yes how do you like it?  I had an Audi about 100 years ago, about 1980 I think.  As I recall, it was a five cylinder which should have been a clue from the get-go.  Fun to drive but high maintenance, but that was a long time ago.  Anyway, I’m very interested in the 2019 Silverado as it’s supposed to be new from the bottom up.  Especially interested in checking out the magnetic ride option.  We shall see.

Rhino4353 New Member

Rhino4353

Posted
Posted

Hi Guys, Just picked up a 2014 Silverado W/T with 37K Miles. Searched through many pages on this thread and mine is a little different. My truck has no vibrations what so ever at 70 MPH+ Smooth as glass (Actually anywhere above 55MPH mine is smooth as glass). Here's where my problems start 25 - 29, MPH 37-39 MPH 47-49 MPH and then sometimes in the 50s.. I have figured out that it will go away a little when I let off the gas.... I doubt it is tires not being  balanced because why would it only do it at those speeds?  I need to take it into dealership but want to have a plan before I do so or have some sort of idea on what this is? any of  you guys find a fix or have similar issues?

 

Wish I would have found this forum before buying. 

taps929 Enthusiast

taps929

Posted
Posted
11 hours ago, Rhino4353 said:

Hi Guys, Just picked up a 2014 Silverado W/T with 37K Miles. Searched through many pages on this thread and mine is a little different. My truck has no vibrations what so ever at 70 MPH+ Smooth as glass (Actually anywhere above 55MPH mine is smooth as glass). Here's where my problems start 25 - 29, MPH 37-39 MPH 47-49 MPH and then sometimes in the 50s.. I have figured out that it will go away a little when I let off the gas.... I doubt it is tires not being  balanced because why would it only do it at those speeds?  I need to take it into dealership but want to have a plan before I do so or have some sort of idea on what this is? any of  you guys find a fix or have similar issues?

 

Wish I would have found this forum before buying. 

Hey Rhino, what I would check first is to see if you have any wedges in your leaf spring stack. What they would do is reposition your pinion angle to help get rid of the highway vibe, but in turn, cause an acel and decel shudder, along with vibes at the speeds your describing. ( I had it done and happened to me) I didn't drive highway much, so I had them taken back out. I couldn't stand it. Hope this helps.

Rhino4353 New Member

Rhino4353

Posted
Posted
9 hours ago, taps929 said:

Hey Rhino, what I would check first is to see if you have any wedges in your leaf spring stack. What they would do is reposition your pinion angle to help get rid of the highway vibe, but in turn, cause an acel and decel shudder, along with vibes at the speeds your describing. ( I had it done and happened to me) I didn't drive highway much, so I had them taken back out. I couldn't stand it. Hope this helps.

Got ya, So what your saying is they might of tried fixing the (70 MPH + VIBRATION) by putting in the wedges so I don't have the highway shake.  But now I have the  25 - 29, MPH 37-39 MPH 47-49 MPH and then sometimes in the 50s... I wonder if their is a fix for it or not?

taps929 Enthusiast

taps929

Posted
Posted

Not sure. I traded my 14' double cab z71 5.3 with 3.42's that had the highway vibe after they basically fired a cannon of parts at the rear end and fixed nothing. I got an 18' crew cab 6.5 bed  (153 wheel base) z71 5.3 with 3.42 and smooth on the highway, but has the low speed vibes like yours. The hard part is to get anyone to admit they feel anything for the slower speeds. Especially since the '19s are coming and redesigned. They are pretty much washing their hands of the 14- 18 Viberados. Best of luck. 

Snoringbear Enthusiast

Snoringbear

Posted
Posted
On 5/18/2018 at 6:45 AM, Rhino4353 said:

Got ya, So what your saying is they might of tried fixing the (70 MPH + VIBRATION) by putting in the wedges so I don't have the highway shake.  But now I have the  25 - 29, MPH 37-39 MPH 47-49 MPH and then sometimes in the 50s... I wonder if their is a fix for it or not?

Your shake showing up  in the low speed range is where torque converter problems often occurs.  I wouldn’t ignore that possibility. 

red70judge Enthusiast

red70judge

Posted
Posted

So I got a call from GM in TX and the repurchase of my vehicle was denied.  Get this...no reason at all...just denied

and no further options discussed...ZERO...end of call.  BBB stated to call them Monday after 1pm EDT.  Stay tuned,

may have to get into arbitration stage.  Whole process not to take more than 40 days.

bosro Enthusiast

bosro

Posted
Posted
On 5/8/2018 at 4:54 PM, Jesse Davidson said:


I don’t emoji23.png


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Me either

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    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Thanks for all that information, I might purchase one and see if it will work for me, if not they may let me return it! Yes for sure the tires are definitely within limit for my truck empty, and when I do tow I'll definitely make sure to raise the rear psi for the amount of weight that's going to be on it.
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      Yes exactly, more and more these days people/companies are afraid of liability issues so its easier just to say no rather than risk putting their neck on the line.    I will say with the Autel unit or when I used it last year on my truck, it wasn't like I could choose the 2025 model year or even the 2024 model year as that option was not there to manipulate the placard pressures but had to go back to 2023 or there abouts and then it showed up as an option, odd but that was how the software was then and I can't say one way or the other now as they throw out updates every so often. I still would talk to your tire dealer though to start with and they may do it for nothing but also they may have a comment on a better unit to purchase. All I know is that one of the large tire shops in my area happens to use these Autel units for their use and set them up to use the wifi and all of that jazz for constant updating because each tire tech has one handed to them by the shop but I just plugged it into my laptop to update it and yes if one is bought it has to be registered so you can get the link to do updates and then the unit has to be updated before its even used. I am not at all techy so it took me a bit but anyway just a heads up for anything you buy, most likely it will need to be connected to a computer to access the internet to have it updated to the latest software version before you can put it to use.   If your truck is near empty, those tire pressures you listed are a very safe upper range pressures to carry the weight, both the front and rear as I know they could be run lower yet with an empty truck. And if its a trailer and not some motorcycle your going to strap onto the front of your truck on a rack, you shouldn't have a need to inflate your front tires if your at 55 front already, its the rear ones that would need more air if you have much hitch weight. 
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Thank you, I'll check that Autel scanner out and see if it will work for me! Ya I can see GM's point of view if they lower the psi set value for someone and the person sell's the truck and the new owner puts the factory tires back on then their could be liability issues cause the psi warning light wasn't coming on when the tires were under inflated for towing their load and then it might be able to be traced back to GM lowering it.
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      I had a similar but different response when I talked to the service manager where I bought my truck in that he said GM corporate won't allow them to lower the placard pressure setting as they would get their hand slapped but that of course they have the ability to make that change. His suggestion was simply go to a tire dealer or third party shop that is willing to reset the pressures lower. However I chose to buy a tpms tool and partly based off of this very forum as it had been proven to work on the 2024 model ( Global B system ) and while I could have paid lots for a full two way diag tool, I didn't want to spend that much and bought the recommended Autel TS 508 and it will reprogram the 2025 model and assume it should do the 2026 as well. However the tool is rather proprietary to reprogramming Autel tpms sensors so that is a function I will never use, where as a real two way scanner would have many uses but also have yearly subscriptions etc where this 508 is free updates for as long as they put updates out for the unit. In any event it worked to lower the placard pressures and I often use it to adjust my actual tire pressures although will check with a mechanical gauge as well sometimes just to make sure that tires tpms sensor isn't lying to me.    My suggestion is either buy a tool that you know will work to adjust the system or start out by getting the tire shop you bought your tires from to reset your truck and if after that you still want a unit to do it yourself, get one at that point. 
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      Here is an image of a quick Google search about these tires on my truck and it's exactly same psi recommendation the Toyo tires company gave me!    I'm not looking for anyone else recommended psi or anything, I'm just looking to see if anyone knew a way to get rid of the factory low psi warning light, because I'm not running high psi and ruining my tires when I'm not towing! 

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