Shake or Vibration Issues

[iLlama]

 

This is exactly what I am experiencing. I dont have any vibrations up until about 72mph and then if I had a cup of coffee more than 3/4 of the way full in the console it would have shaken it out on the floor.

 

Exact same thing. That's good that it's not just me then LOL.

 

I go to the dealer for the first time today at 12:30pm and will see what they say.

[14SLTZ71]

Need to copy and paste this entire thread into an email and send it to all of the top level GM executives. Getting their email addresses may be a bit tricky though.

Edited September 17, 2014 by 14LTZZ71

[iLlama]

So I just got back from my dealer visit.

 

Apparently GM is well aware of the issue. The service manager I worked with was a really cool guy and he said they have had a issues with multiple trucks and have had the engineers out more than once to try and diagnose what the issue is with no luck. He said GM has know about the issue for about 6 months and just recently told the dealer to stop throwing parts at the truck. He said they have tried replacing tires, rims, rear and, and driveshafts on multiple trucks with it never fixing the issue, so essentially they are awaiting GM to figure out whats going on.

 

As far as my ruck goes, we got it up to 75 twice in a ride along and couldn't replicate the issue. It drove me nuts and made me look liek a idiot, but he said he could try RF balancing the tires if I wanted. I declined for the time being as I wanted to see why it wasn't vibrating now and to see if it still was. On my way home on the highway, sure enough, it started vibrating again at 72mphish. The only difference was the roads we were driving on, one was a "smooth" highway, which made it vibrate, and the other was a "smoothish" back road. I took another way home as opposed to the normal highway route and got up to 75 mph, and no bad vibrations at all...... Does not make any sense besides the highway I am driving on is messed up, but that would have to mean its messed up for a 20 mile stretch on both sides.

 

I wonder if on the "back roads" if the suspension is hitting smaller bumps that is "loosening" up the suspension making it not so stiff? I do not know....

 

The service manager said my Sierra was one of the smoothest he has driven. He could have been blowing smoke, Im not sure. We drove a "loaner" Sierra that vibrated WAY worse than mine.

[RageMonkey]

So I finally got around to bringing mine in to get it's first oil change at 5000km. I told them about the vibration and this is the 3rd dealer who either played dumb or literally have never heard of the issue yet.

Anyways since I have aftermarket 18" rims with Grabber AT2 rubber, they said there wasn't much they could do unless I put the stock rims/tires back on. They said they checked the u-joint, etc...etc... but there would be nothing they could unless they get my stock tires back on. Only problem, I sold the tires 3 months ago. SO with that being said, sounds like they are basically pushing me off to the side because they are blaming my road force balanced tires and rims. The truck shook WITH the stock rims and tires before the swap out as well.

This is also the dealership that took literally 2.5 hours to do an oil change when I had an appointment. Soooooo.... I'm getting tired of GM already.

Edited September 17, 2014 by RageMonkey

[skylineflyer]

So I just got back from my dealer visit.

 

Apparently GM is well aware of the issue. The service manager I worked with was a really cool guy and he said they have had a issues with multiple trucks and have had the engineers out more than once to try and diagnose what the issue is with no luck. He said GM has know about the issue for about 6 months and just recently told the dealer to stop throwing parts at the truck. He said they have tried replacing tires, rims, rear and, and driveshafts on multiple trucks with it never fixing the issue, so essentially they are awaiting GM to figure out whats going on.

 

As far as my ruck goes, we got it up to 75 twice in a ride along and couldn't replicate the issue. It drove me nuts and made me look liek a idiot, but he said he could try RF balancing the tires if I wanted. I declined for the time being as I wanted to see why it wasn't vibrating now and to see if it still was. On my way home on the highway, sure enough, it started vibrating again at 72mphish. The only difference was the roads we were driving on, one was a "smooth" highway, which made it vibrate, and the other was a "smoothish" back road. I took another way home as opposed to the normal highway route and got up to 75 mph, and no bad vibrations at all...... Does not make any sense besides the highway I am driving on is messed up, but that would have to mean its messed up for a 20 mile stretch on both sides.

 

I wonder if on the "back roads" if the suspension is hitting smaller bumps that is "loosening" up the suspension making it not so stiff? I do not know....

 

The service manager said my Sierra was one of the smoothest he has driven. He could have been blowing smoke, Im not sure. We drove a "loaner" Sierra that vibrated WAY worse than mine.

This is not sounding promising to me. And yes, I was mistaken on the MPH for me. I think I said 75, its more like 73.

[seansharley]

My ¢.02 Rubber compounds are hiding, and amplifying the flutter if there is one in these trucks. I believe 100% this is a harmonics thing. Here's my reasoning, 2014 crew cab 4x4 6.2. Dealer swapped 2 Goodyear ls2's after road force numbers were out of spec. No change. Replaced all 4 with Michelin ltx, 20". Rode perfect, after about 5k miles I felt an intermittent "flutter" again at 73+ hit or miss on certain stretches of road. My wife's car, ex wife's car, and best friends car all have same flutter on the same road.

[fondupot]

My loaner that I am driving while my truck is at the dealer is a vibrator.

 

Its an SLE Crew cab, short box, 5.3, 3.08 gears. It has either the basica 17" or 18" wheels and i dont remember what tires. has a subtle vibration around 45-50mph, something that my truck does NOT do. Haven't had an opportunity to take the loaner on the highway tho.

 

I can see why this would annoy people.

[Rentzkyle]

I have read about a third of these pages and seems like there is a never ending issue. I have a 2014 silverado 1500 crew cab 5.3l 2wd and is lifted 7" on 35s. I thought it had to be something with the lift but it has been lifted since 1000 miles and drove perfect. Now i have 9000 miles and the shake at 55 is rediculous. I called the dealer to see if they had any issues with other trucks with the vibration and he told me he had a few but were solved when roadforced the tires. I dont even want to take it in becuase they are going to blame it on the lift.... I guess i have to deal with it untill gm comes up with a fix!

 

The tires i have are Toyo Alterains and rouch country lift kit which included new shocks. So in my opinion its not the tires nor the shocks in my case.

Local Shop i took it to that does lift kits and so forth thought it was the drive line angle so they changed it for me and now it seems worse.

IDK what to do!

[fondupot]

I have read about a third of these pages and seems like there is a never ending issue. I have a 2014 silverado 1500 crew cab 5.3l 2wd and is lifted 7" on 35s. I thought it had to be something with the lift but it has been lifted since 1000 miles and drove perfect. Now i have 9000 miles and the shake at 55 is rediculous. I called the dealer to see if they had any issues with other trucks with the vibration and he told me he had a few but were solved when roadforced the tires. I dont even want to take it in becuase they are going to blame it on the lift.... I guess i have to deal with it untill gm comes up with a fix!

 

The tires i have are Toyo Alterains and rouch country lift kit which included new shocks. So in my opinion its not the tires nor the shocks in my case.

Local Shop i took it to that does lift kits and so forth thought it was the drive line angle so they changed it for me and now it seems worse.

IDK what to do!

 

In your case, I would almost definitely attribute your issues to the lift. Did you have the lift kit re-torqued after 500-1000 miles after install? and also I think every 5000 miles after that you should check the lift kit bolts.

[Rentzkyle]

I had the shop look over the lift. (not sure if they re-tightend everything) and told me everyting looks fine. no split bushing or anything. I also have the slight vibration at idle. I tried the water cup trick and sure enough its shaking. I guess i am going to be one of those few who wait untill they come out with something to fix it to get it done. Only because there is way more things that could be the problem on my truck.

[1997SierraSLT]

Large oversized tires with a pretty aggressive tread pattern could also be a contributing factor. They are hard to keep balanced and also hard to maintain even tread wear.

Edited September 18, 2014 by 97SierraSLT

[PMurray]

Picked up my 14 Sierra 40 to 50 mph vibrator after a 9 day dealer visit while I was on a near 2000 mile motorhome trip (94 Ford SuperDuty chassis). Glad my GMC doesn't shake like that Ford! Waiting for a new rear end GM thinks will correct my vibration. My feeling is that this is a transmission issue but what are the chances that GM would start replacing all of our transmissions? ZERO.

[Rentzkyle]

Large oversized tires with a pretty aggressive tread pattern could also be a contributing factor. They are hard to keep balanced and also hard to maintain even tread wear.

 

I agree but my tires are more alterain and not mud terian tires so they are not agressive at all. I had them roadforced balanced and roated with same issue. Trade wear is even since they are fairly new anyways

[Silverado-Hareek]

My feeling is that this is a transmission issue but what are the chances that GM would start replacing all of our transmissions? ZERO.

 

Exactly why I think they'll address the issue for 2015's and leave 2014 owners out to dry....

[1997SierraSLT]

I could see where the differential could be contributing factor for this vibration issue. Not taking into account harmonics, to induce vibration a component/assembly must be out of balance and the rotating mass of the components/assembly must be taken into account. I do not believe the ring gear is a major contributing factor as it is a precision machined component but has a good deal of rotating mass. Couple this to the differential carrier and there could be an issue and the carrier is made from a raw casting and not every surface is precision machined and the carrier has a lot of rotating mass.

 

Assuming your tach is at 2000 RPM at 70 mph and you have 3.08 gears, your differential is spinning at 433 RPM ((2000 RPM x .667 final transmission drive ratio / 3.08))

 

I wonder if all of these various rotating components/assemblies are dynamically balanced? They should be, but who knows as it does add labor & cost.

 

I'd agree that the vibration is a combination of several contributing factors and would also lean towards the transmission being the largest influence. But, the cost to replace would be prohibitive and GM would rather just do a buyback and get the customer into a different 2014 or 2015 model.

Edited September 18, 2014 by 97SierraSLT