Jump to content

Shake or Vibration Issues

Silver space ship
 Share

Recommended Posts

Jesse Davidson Enthusiast

Jesse Davidson

Posted
Posted (edited)

If this is true, GM should be able to hold their supplier accountable for the costs to replace the rear ends, no?

 

Does anyone know if this was a new supplier or a new line for our trucks? Do they make all gear sets or just certain ones?

they changed the method for how they cut the gears. supposedly they went from a 5 step to a 2 step

 

All good....just picked it up and the new tire & road force balance did the trick......

huh? so have you already had it in the shop for vibration?

 

I'm going to start a class action suite against the LT owners who go it for free.

I'll give mine back if they give me full MSRP so I can change brands, I don't like this feature

Edited by Jesse D
  • Replies 12.9k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

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

Posted Images

PMurray Enthusiast

PMurray

Posted
Posted

Do they require rear end replacement with 4k miles on the clock?

GM was so much more efficient than that! Truck was delivered with that requirement already built in.

My point, however, is that some of us have been lucky enough to get our vibes fixed. It's one fine truck vibe free.

 

Sent from my SM-N900V using Tapatalk

PMurray Enthusiast

PMurray

Posted
Posted

If this is true, GM should be able to hold their supplier accountable for the costs to replace the rear ends, no?

 

Does anyone know if this was a new supplier or a new line for our trucks? Do they make all gear sets or just certain ones?

Legally, I believe that GM is responsible for ensuring that parts meet specs before installation. Cutting corners, in this case, is costing GM big time, unless the customer accepts the "performing as designed" b.s.

 

Sent from my SM-N900V using Tapatalk

FogDucker Enthusiast

FogDucker

Posted
Posted

Legally, I believe that GM is responsible for ensuring that parts meet specs before installation. Cutting corners, in this case, is costing GM big time, unless the customer accepts the "performing as designed" b.s.

 

Sent from my SM-N900V using Tapatalk

Sure, but if the root cause was a bad batch of parts, GM in theory shouldn't be as resistant to fixing this since they shouldn't have to eat the cost of parts and labour. They should be able to recover the costs from AAM.

 

AAM may not have been cutting corners while cutting gears. This 5 to 2 cut process seems interesting and ironically was designed to reduce nvh.

 

Either way, it looks like GM engaged and have found the issue(s). This is great news.

TheFactor Enthusiast

TheFactor

Posted
Posted (edited)

GM has provided the vibration feature as standard equipment on a select number of trucks.

I think on one of there commercials they refer to this feature as perfection .

Edited by TheFactor
2doorpost Enthusiast

2doorpost

Posted
Posted

This was discussed before and someone stated that their truck which was repurchased by GM showed up on his dealer's lot as a "certified used vehicle" several weeks later.

 

Buying back to GM means finding another sucker to buy the same truck.

When I was having problems with my Sierra with the frame coating peeling , the CARFAX listed "inspections" and "serviced" when the truck was traded in and hit the used lot. Some other poor sap ended up with a " beautiful like new " Sierra - raining rust from underneath.

If you are buying low mile used- best to ask for the dealer service report on what was actually done.

C6Bill Enthusiast

C6Bill

Posted
Posted

Either way, it looks like GM engaged and have found the issue(s). This is great news.

 

 

They have ????? Well what is it, we would all love to know !!!!!

C6Bill Enthusiast

C6Bill

Posted
Posted

More than a few reports in this thread of folks that have had their rear end replaced without any improvement at all. Now were they replaced with more defective parts, who knows.

Jesse Davidson Enthusiast

Jesse Davidson

Posted
Posted

I'd be interested in knowing what everyone's road force balance numbers are.

they don't matter, they aren't the root of the problem. GM has actually dropped their allowable spec to below industry standard to try to reduce the vibration.... it hasn't worked

14silverado4.3 Enthusiast

14silverado4.3

Posted
Posted (edited)

Still dicking around with mine, waiting for the GM to figure a solution....

 

I still go back to thinking about Electronic Power Steering Software issue..

 

I have good RF on rear tires, Fronts are slightly high with 16 and 21 RF numbers.

 

Getting a slight vibration in fronts on straightaways, highway speed sweeping turns excites the vibrations.

 

According to the Smooth Road Shake Software, it should compensate for slight out of balance conditions.

Why is it not compensating? The following comes directly from GM advertising:

 

Has anyone tried or had their service department reset the software for this?

 

 

Electric Power Steering System

 

The belt-driven electric power steering system features an integrated electromechanical power steering unit, containing the power steering control module, its sensors, the power steering motor, a belt drive and a ball nut mechanism.

 

The power steering control module is part of the power steering assist motor assembly and is replaceable as a complete unit independent of the steering gear assembly. The torque sensor is integrated with the steering gear pinion and is serviced as part of the steering gear.

 

The power steering control module has a software feature referred to as Smooth Road Shake Compensation that reduces steering wheel vibration caused by an imbalance from the front tire/wheel assemblies. The vibration transmitted to the steering wheel is referred to as Smooth Road Shake and is a phenomenon that occurs only at highway speeds and on smooth roads. The power steering control module employs active controls to sense and reduce the periodic torque component applied to the steering wheel caused by the wheel imbalance force. This software feature will compensate for a specific range of imbalance.

 

In addition to smooth road shake, road crown is compensated for by the steering wheel angle sensor signal, which calculates the intended driving direction. The Electronic Brake Control Module (EBCM) receives serial data message inputs from the steering wheel angle sensor.

 

The steering wheel angle sensor does not require centering often. However, if the steering wheel angle sensor is not correctly centered it may create a lead/pull condition. If this condition is encountered, always perform the Steering Angle Sensor Centering procedure in SI before performing a wheel alignment

Edited by 14silverado4.3

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
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • BDS my HD
      Brand new to this forum. Questions about re-gearing my 26’ HD

      By BDS my HD · Posted

      Hello hello looking forward to expanding my knowledge of the 2026 2500 HD that I just bought.   Truck has 3500 miles on it four-wheel-drive crew cab and I’m about to put a 6 1/2 inch BDS lift on it 18 x 10 -25 offset with 37’s   Already have the wheels and tires just waiting on the lift install in about three weeks   Question what surprises am I not gonna be happy with?  I’m not new to lifted trucks so I know that acceleration towing gas mileage all that is affected..   Question is those of you that have this truck this powertrain with a 10 speed Allison and have done the mods that I’m doing,,, how bad is it? Is that Allison constantly gonna be hunting for the right gear to go into? And what about towing, acceleration, fuel consumption as mentioned?    Lastly how come I can’t find any ring pinion gear set up for these axles and when could I expect to see them?   I apologize if there’s any typos I’m doing speech to text on my iPhone.    
    • linc45bn
      2013 2500HD 6.0L intermittent no crank no start

      By linc45bn · Posted

      I've got a 2013 2500 6.0L Flexfuel. Drove the truck earlier today with no issues. Went to run an errand tonight and noticed key fob wouldn't work. Figured battery was dead, so replaced fob batter. Still wasn't working. Grabbed my other set of keys with the other fob and that one wasn't working either. So I manually unlock truck and insert key. Interior lights come on, dashboard lights up, turn key and truck starts. Turn truck off, like a moron, and try starting again. This time no crank, no click, no nothing. Lights still come on and dash lights up, but now I'm getting a service 4wheel drive, service tire monitor, etc. Check voltage on battery and Im showing 12.2v. Throw my battery charger on it and give it 15 mins and try starting again. But still no crank no start. Decide maybe its a bad battery, run to autozone grab a new one and put it in. Same issue. Disconnect battery and let it sit for 15 mins. Try again and still nothing. I had managed to roll the windows down earlier as its a humid night, but now I can't get them to roll up. Power locks are also not working now. Then randomly I try the key again, and it fires right up. Immediately I roll up the windows as we have nothing but rain forecast this week. I shut it back off wait 30 seconds and start up again. Worked a 2nd time. So turn it off, start putting things back together. Try one more time, and back to no crank no start. And now the car alarm starts going off. Had to disconnect battery and leave it that way for the night as I don't think my neighbors would appreciate my alarm going off again tonight. Any thoughts or help would be appreciated. 
    • Grumpy Bear
      first oil change - 2026 2500HD gas

      By Grumpy Bear · Posted

      No one will care for you like you care for you. Do what you can for as long as you can. IMHO of course. 
    • Grumpy Bear
      Oil Consumption

      By Grumpy Bear · Posted

      How about them NICKS!!! 
    • Peoplemvr
      GMC 1500 Illuminated Front Grill Emblem REPLACEMENT.

      By Peoplemvr · Posted

      Hi there.  Long time lurker, first post.    i have read the previous posts regarding the water ingress problem with this emblem.  I bought my 1500 SLT the  summer of 2025 new and after reading the MANY problems with these emblems failing I decided to install one anyways.  As per a YouTube video, I sealed ( or tried to) this sign with silicone sealant around the outer perimeter joint and the holes that were already somewhat sealed on the rear plate of the emblem.  And installed the connector assembly using dielectric grease on the connectors. The installation looked great and worked well for about 4 months……then FAILURE.  Grrrrrr…… I live in the great white north and wash my truck weekly in an automatic car wash  to keep the salt off.  Let me tell you that removing the old, failed emblem is a whole different animal than removing the OEM individual letters without removing the grill assembly. Mainly because the illuminated logo is built differently than the original letters which  you can remove the red surface lettering with a knife or some kind of blade which gives access to the tabs which hold the logo onto the grill. So I had to essentially destroyed the old emblem to remove it. Doing so killed my chance of doing somekind of autopsy on the failed , old logo.  But there was plenty of water inside when I ripped it apart.  Prior to installing the new assembly I tried it with the old harness and it works fine.   Does anyone have any insight as to where the water is getting into this emblem? I intend to seal the new logo with slow curing epoxy this time around using a syringe.  I think this newer emblem may be an updated unit which I hope GM got the vendor to fix. It has an October 2025 date on it.    If this one  fails,  I am just going to revert back to the non-illuminated letters….AFTER PULLING THE GRILL.    Any thoughts on sealing with epoxy would be appreciated. Thx!   Doug  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...