Shake or Vibration Issues

[abominable z71]

I have aftermarket exhaust and afm disabled and it still vibrates.

Tech at the dealer said my exhaust was probably causing the vibration [emoji34] .....It vibrated with the stock exhaust also.

 

 

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F-ing GM will try to blame everything under the sun other than their piss poor engineering.

[FogDucker]

Hub flange turns true. Bolt circle for the studs is completely off center shouldn't be an issue for hub centric wheels except the wheels are drilled for cone seat nuts which inevitably tries to center the studs in the holes, and since the center portion of the wheel is oversized by about .040" to allow a free fit on the hub pilot flange the wheel is allowed to be mounted with it's axis off center from the hub center and aligns itself with the bolt circle. I have one tire with a little bit of runout in the tire itself I'm going to try and mount the high spot of the tire 180 degrees out from the high spot on the stud bolt circle and see if that offers any improvement might alleviate the up and down during rotation but the center that the balance was used for will still be off by .015".

I remember reading, either in this thread or the suv thread, that this had positive results for somebody. Could the randomness of this problem be related to the randomness of how wheels are mounted? Are you going to rotate one at a time or both?

[FogDucker]

I'm told my truck was successfully repaired!

Do I believe it? No. But I do have a glimmer of hope as I sent one of my guys (who isn't as in tune with these things as I am) to pick it up and he said it's good as well as the head service mgr who I've delt with since day one and has drove it with me 4xs.

So now the "explanation"...

So they started where they all start. The tires. Road Force revealed some abnormalities, exact readings I'm unaware of, but adjustments were made. They drove the truck and still detected vibration with the GM vibration detector and their butts. They went to the rear tires and re balanced them on the "NEW" laser balancer and found nothing out. Remounted the wheels, drove it, was worse. The tech simply rotated the rims on the studs 180 degrees and drove it again. NO VIBRATION!

 

What the hell? So now the theory is the hub centric wheels don't mount perfectly everytime or could be sensitive to even torque during installation. The dealer believes the wheels them selves could be the problem. Being the second set, it could be a manufacturing issue.

 

Thoughts?

I'll be to it in an hour or so to give it my full assesment.

 

2015 Denali 3500 DRW, Michelin ltx, 4x4

 

I found it! It was post #4293 in this thread.

 

@abominable z71: Does this support your findings?

[pm26]

So now the stud holes on the axle flanges are not drilled equidistant from the center of the axle?

Edited December 17, 2015 by pm26

[Enforcer]

Cats out of the bag. Wonder how much attention it will grab?

 

http://www.autoguide.com/auto-news/2015/12/there-s-a-big-issue-with-gm-s-suvs-and-no-one-seems-to-have-a-solution.html

 

Thanks for passing on this link ;)

 

I'll be passing this on, they will really flip when they find out that there are more trucks and it dates back to 2013 !

 

 

 

Edited December 17, 2015 by Enforcer

[WLC]

I recall that 14silverado 4.3 said his vibs changed when they r+r his wheels and tires. Where are these wheels made and how good of quality control?

So now the stud holes on the axle flanges are not drilled equidistant from the center of the axle?How can this be checked?

 

[jeffziss]

Read and share this article please :

 

http://www.autoguide.com/auto-news/2015/12/there-s-a-big-issue-with-gm-s-suvs-and-no-one-seems-to-have-a-solution.html

I just added this link to dontbuyasilverado.com Thanks for sharing. I'm guessing most of the industry magazines won't say/do anything as GM spends a fortune with them. JD Power's Initial Quality award is the perfect indicator of marketing at it's best!

 

Update on my truck - My 2016 is on it's third set of tires. Dealer is blaming the tires that I had installed and won't do anything. The tire specialty shop I went to, only does tires and has only done tires for 80 years. They offer no other services other than tire replacement. They Road Force Balanced the tires twice. The vibration is exactly the same as the stock tires and a set of aftermarket wheels/tires that I tried.

 

The battle continues. Off to look at a new Ford or Toyota tomorrow evening. Seems like the best solution for the GM vibration issue is really another brand.

[jeffziss]

 

Can't you eliminate the suspected hub runout issue by measuring the lateral and radial runout with a good dial indicator gauge?

When they Road Force Balance the tires/wheels, they should be checking this.

[FogDucker]

I recall that 14silverado 4.3 said his vibs changed when they r+r his wheels and tires. Where are these wheels made and how good of quality control?

The wheels are made in China. My Yukon Denali wheels are and my Sierra AT wheels are, at least. I believe the country of origin is stamped (or cast) on the inside of the wheel.

 

Can't comment about quality.

[Bdkfl]

I just added this link to dontbuyasilverado.com Thanks for sharing. I'm guessing most of the industry magazines won't say/do anything as GM spends a fortune with them. JD Power's Initial Quality award is the perfect indicator of marketing at it's best!

 

Update on my truck - My 2016 is on it's third set of tires. Dealer is blaming the tires that I had installed and won't do anything. The tire specialty shop I went to, only does tires and has only done tires for 80 years. They offer no other services other than tire replacement. They Road Force Balanced the tires twice. The vibration is exactly the same as the stock tires and a set of aftermarket wheels/tires that I tried.

 

The battle continues. Off to look at a new Ford or Toyota tomorrow evening. Seems like the best solution for the GM vibration issue is really another brand.

Sorry you are going through this with a 2016 - you can use some of my experiences on your site if you want. Just look though my posts. I'm on my second truck a GMC, first one was replaced by GM. We just got this one back after its final repair attempt with the engineers and it's worse than ever - maybe as bad as our first Silverado. I keep forgetting to post the video of the day we picked it up. I have posted a few other videos on the thread also. What state are you in?

[14silverado4.3]

So the flange holes need to run true to the center of the axle shaft? How far off can they be before you feel it?

 

When you mount the tire to the hub the nuts center to rim on the stud bolts?

 

Are we thinking that the bolt circle is shifted off center to the axle center? Someone can lay this out in CAD program? Cut out the bolt holes and place it over the flange? It should at least give an idea how far off center?

[dave07]

I just added this link to dontbuyasilverado.com Thanks for sharing. I'm guessing most of the industry magazines won't say/do anything as GM spends a fortune with them. JD Power's Initial Quality award is the perfect indicator of marketing at it's best!

 

Update on my truck - My 2016 is on it's third set of tires. Dealer is blaming the tires that I had installed and won't do anything. The tire specialty shop I went to, only does tires and has only done tires for 80 years. They offer no other services other than tire replacement. They Road Force Balanced the tires twice. The vibration is exactly the same as the stock tires and a set of aftermarket wheels/tires that I tried.

 

The battle continues. Off to look at a new Ford or Toyota tomorrow evening. Seems like the best solution for the GM vibration issue is really another brand.

When does the vibration happen on your 2016 truck?

[jeffziss]

70+mph

[dave07]

70+mph

Crazy. Had my Silverado over 70 a few times looking for vibes. Nothing, it's smooth everywhere. Sucks you guys are having these issues.

 

 

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[abominable z71]

I remember reading, either in this thread or the suv thread, that this had positive results for somebody. Could the randomness of this problem be related to the randomness of how wheels are mounted? Are you going to rotate one at a time or both?

Going to focus on the drivers rear first and see what the results are. I did clamp the rear springs last night like buster12 had posted and it made a significant improvement. Cheap thing for anyone else to try and takes about 10 minutes to install. Most autoparts places have them in stock for about 15 bucks.