Shake or Vibration Issues

[C6Bill]

Noticing it is one thing, doing something about it is another.

[polarys425]

Well my 2014 was a 6.2 and it didn't start vibrating until around 1500 miles. It wasn't as bad as some of the others out there but still annoying enough for me to trade out of it.

Did you have the 6 speed or the 8 speed trans?

[Jesse Davidson]

 

 

I can't help it, i'm addicted. I keep coming back in hopes tat there is a fix. You'd think i wouldn't care one way or the other as I drive a Tundra now but I"m still rooting for you all. I keep coming back hoping I will see IT'S FIXED !!!!

hahahaha glad the mods didnt delete your account then hahaha

 

Thank you for the links to the articles. I have updated my website. If it makes anyone else feel better, my website has had a couple of thousand views and almost two dozen people have confirmed not purchasing a GM because of what they have found on the website and the forums listed within it.

 

GM Customer Service called me this week to see how I was enjoying my replacement 2016 Silverado. I directed them to my website

perfect!

[Wrench589]

It would be nice if there was a way to put vibration sensors in multiple locations around the truck, tied into a diagnostic computer, and run down an ultra flat stretch of road and pick up the sensor with the most vibration and concentrate on that area for issues. Anybody tried replicating it on a dyno where only the powertrain and rear tires are the items that could be the cause? It Would eliminate both road surface, front end components from being the culprits. Or i guess it would eliminate the powertrain and rear suspension depending on the results. just a thought. I do notice my hood buffets at high speed but, i can't see it being that.

Well, there certainly is. There are multichannel vibration recorders with up to 32 or even 64 channels, but very expensive to say the least. The 2 channel analyzer I have at my work cost $25,000 over 10 years ago! Nowadays, a 4 channel analyzer runs at least that, or more.

 

That said, in the old days, we used to use multichannel tape recorders to garb the vibration data, then play it back with a single Chanel analyzer channel by channel. Took forever, but the recorders weren't that expensive. Might be able to adapt a multi track sound recorder to do the same, but there will still be a big cost for the accelerometer charge amplifiers. Accelerometers are pretty cheap these days, as low as $100 each. But the amplifiers are expensive...as much as $500 each. NFG for the DIYer.

 

National Instruments makes a excellent line of USB vibration cards but once you buy the card and the software, getting close to $10,000. Still, for a high end 4 channel analyzer, it's a bargain!

 

Another option is renting. There are lots of industrial instrumentation rental companies around that rent everything from oscilloscopes to calibration gear to vibration analyzers. Might be a more affordable option.

 

As as another poster mentioned, a used EVA and doing one location at a time. If you find a smooth piece of road, just keep,going over the same road at the same speed. Slow a tedious, but that the life of a vibration analyst!

 

Another thought....I don't see why one can't put the truck up on jack stands or wooden blocks and run it up tom70 mph and take some vibration readings. That way, there is absolutely not influence from the road of even the load on the tires. And, isolates the entire front end. If it still shakes, then it is clear it is mass unbalance somewhere in the parts spinning. Even the frame is getting virtually no shaking from the suspension other than the spinning masses. And with a vibration analyzer, you can see the dominant frequency and zero in on engine speed, transmission/driveshaft, or wheels/tires/axles.

[Wrench589]

I took the vibration analyzer and went out for a test drive today. Mounted the accelerometer on the seat rail on the passenger side (has to slide the slide fully back to gain enough clearance for the magnetic mount). The lowest reading I got was around 30 mg. GM spec in 13-03-10-002 is 12 mg. Now, the vibs (and buffeting) typically come and go. When gone, the vibs were 30 mg. At times, would be at 40 - 60 mg. All this at constant speed of 110 kph. When accelerating from a start, over 100 mg. But, goes away pretty quick, so not the end of the world.

 

So, all this with 2 new tires recently and RF balanced.

 

Now, the other thing to remember is these readings are at one location only. I have no idea if this is a node (point of maximum vibration) or anti-node (point of minimum vibration) or somewhere in between. Short of testing every square inch of this piece of shit, I don't know. But I do know it's 3 to 4x GM spec. Guess I'll be calling the dealer on Monday!

[Axe727]

I went to the dealer and they said my truck was fine. I'm going in to a shop on the 28th of January and they are going to put it in the air and drive it and listen to the entire drive train and then check the ring and pinion. I will post my results and video any findings. They are an off-road shop and very good at what they do so I am hoping for them to find the issue.

[BO TIE 1]

I went to the dealer and they said my truck was fine. I'm going in to a shop on the 28th of January and they are going to put it in the air and drive it and listen to the entire drive train and then check the ring and pinion. I will post my results and video any findings. They are an off-road shop and very good at what they do so I am hoping for them to find the issue.

Thanks man look forward to hearing what they find.

 

Sent from my VS990 using Tapatalk

[Homer650]

Picked my truck up from the dealership on Thursday after they put the bandaids (hose clamps) on the drive shaft. Wasn't able to get it out on the interstate until today. Well, the vibration is gone from the seats BUT now it's all in the steering wheel and the floor, where it wasn't before. I also didn't have the V4 vibration others have stated but I do now. UGH!!! That was visit #5 so I'll be talking to the dealership on Monday about taking this piece of metal back!

[C6Bill]

Did you have the 6 speed or the 8 speed trans?

 

 

They didn't have the 8 speed for the 2014's

[polarys425]

They didn't have the 8 speed for the 2014's

Do we know if any of the 15's with the 8 speed trans have the vibration issue?

[LongrangeLauber]

Do we know if any of the 15's with the 8 speed trans have the vibration issue?

Yes I believe a few that have posted here have the 8 speed tranny. There is no rhyme or reason to these vibrating trucks. Some do, some don't

[oneandzero]

Update

Dealer has finally acknowledged my truck has a vibration.

I don't know every detail but they installed the original rims and tires. GM tech required all trouble shooting to be done with them. Then if the problem is resolved the snow tires will be re-installed and if there is vibration they will replace the snow tires.

 

Original tires were RF balanced but truck still had a vibration. Then a Pico Scope was used and the dealer determined that truck needs a new drive shaft. The dealer is really not 100% sure what the problem is. The new rear end was installed because old one was most definitely the cause a couple weeks ago. The vibration they are now working on is between 65 and 80kph. The vibrations at 115kph and up are intermittent and seem to worsen after extended driving.

I was given the truck back for the weekend to test out and its is better than before. I am almost certain the snow tires will also be replaced because from what I'm seeing now they worsened the existing issues. The dealer has said they have had a lot of troubles with Firestone tires and in most cases the fix installing Michelin.

 

The transmission was reset and it shifts marginally better.

 

What some have mentioned here IMHO is true. There is more than one cause for these vibrations.

Edited January 10, 2016 by oneandzero

[C6Bill]

I believe in 2015 they added the 8 speed to the 6.2's and for 2016 they made the 8 speed available for the 5.3 too.

[Jesse Davidson]

Yes I believe a few that have posted here have the 8 speed tranny. There is no rhyme or reason to these vibrating trucks. Some do, some don't

I believe that is correct

Update

Dealer has finally acknowledged my truck has a vibration.

I don't know every detail but they installed the original rims and tires. GM tech required all trouble shooting to be done with them. Then if the problem is resolved the snow tires will be re-installed and if there is vibration they will replace the snow tires.

 

Original tires were RF balanced but truck still had a vibration. Then a Pico Scope was used and the dealer determined that truck needs a new drive shaft. The dealer is really not 100% sure what the problem is. The new rear end was installed because old one was most definitely the cause a couple weeks ago. The vibration they are now working on is between 65 and 80kph. The vibrations at 115kph and up are intermittent and seem to worsen after extended driving.

I was given the truck back for the weekend to test out and its is better than before. I am almost certain the snow tires will also be replaced because from what I'm seeing now they worsened the existing issues. The dealer has said they have had a lot of troubles with Firestone tires and in most cases the fix installing Michelin.

 

The transmission was reset and it shifts marginally better.

 

What some have mentioned here IMHO is true. There is more than one cause for these vibrations.

If Firestone if the OE tire, it should work with it, IMHO Bridgestone and Firestone , are some of the best off road/winter tires, without getting in to the massive 35" off road tires or something like it

I believe in 2015 they added the 8 speed to the 6.2's and for 2016 they made the 8 speed available for the 5.3 too.

I believe that is correct

[tonygxp]

I believe in 2015 they added the 8 speed to the 6.2's and for 2016 they made the 8 speed available for the 5.3 too.

correct and to answer that other poster's question, i too have/had the vibration in mine in the upper 70's most evident.

 

Has since changed to intermittent same speed though. on some highways since the RF balance of the right front tire it is still bad.. but it is better overall, just not fixed.. enough to disturb me and after next weekend's 2.5 hour each way trip to the poconos i'm sure i'll be back at the dealer lol

 

 

 

it's definitely a culmination of issues which are exacerbated under different conditions, speed / road / load.. imho.