Shake or Vibration Issues

[Jesse Davidson]

Here is an interesting read that I found for frame beaming for older chevys, note the lower RFB that GM is specifying.

 

Boys and girls, the symptoms are very similar to what we are experiencing.

 

 

 

 

 

This PI was superseded to add additional info about an oily film on the new mounts. Please discard PIT3009H.

 

 

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

 

Condition/Concern:

Beam shake vibration is usually felt in the seat and occurring at speeds between 40-50 mph (64 - 80 km/h). Hertz readings using an EVA tool are normally between 8-24 Hz. This condition is most common on extended cab and crew cab models but has also been noted in other models.

 

Recommendation/Instructions:

The severity of beam shake may vary from vehicle to vehicle. To determine if the concern is beam shake, please perform the following:

1. Test drive vehicle to confirm the condition. A beam shake condition will usually respond to concrete type pavements more than asphalt, so the vehicle should be driven over both surfaces if possible.
2. Place 200-500 pounds in the pickup bed between the closed tailgate and the wheel wells. A beaming condition should dissipate.

Note: Tires with excessive Radial Force Variation (RFV) or out-of-roundness can intensify the frame beaming concern. The following radial force variation numbers should be used as a guide:

P-Metric tires (2wd 1500) 12 lbs or less

P-Metric tires (all others) 24 lbs or less

LT-tires 30 lbs or less

If the concern is determined to be beam shake, this is a characteristic of the vehicle. GM Engineering has released updated body mounts to reduce this concern for the Crew and Extended Cab Models. There will be no changes made to the Regular Cab Models.

FOR CREW AND EXTENDED CAB MODELS, REPLACE THE REAR CAB MOUNTS WITH UPDATED PARTS LISTED BELOW. THESE PARTS SHOULD NOT BE USED ON REGULAR CAB MODELS.

New upper and lower mounts should be installed at the left and right rear cab position. The new LOWER mount is a two piece design, meaning there is a rubber mount with a metal washer. Some models may use a one piece lower mount, meaning the rubber mount has a metal washer molded into it. If the vehicle has the one piece lower mount design, washers (PN 15854745, Qty 2) will be needed to be used with the new lower mount.

Note: Some new body mounts may have an oily film covering them. This oily film may be left on the mounts during the assembly process and does not indicate a faulty mount. Do not replace the mount for this issue.

Upper Mount 25791031 Qty 2

Lower Mount 25791032 Qty 2

Washer 15854745 Qty 2 (if needed)

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

can you post the actual link, those wont work

 

Hello Taco? You mean, hello Pearl Harbor!

Sayonara- English translation = C-ya!

Toyota (specifically Tundra) is far more American than GM, as FogDucker says below. I believe the Tundra Crew Cabs are even higher than 60% American though.

 

Last Night I bought a preowned GMC Sierra 1500 and today I noticed the rear left part of the truck vibrates. I was going to take it in to the dealer tomorrow. I have the remaining balance of the warranty transferred.

What should I tell the dealership tomorrow?

I agree with Severado, bring it back and say you changed your mind. get rid of that POS

 

The Tacoma has more US/Canadian content than the Silverado/Sierra. 60% vs 45%, respectively.

 

http://www.edmunds.com/car-reviews/top-10/top-10-most-american-trucks-for-2015.html

 

Buying American isn't what it used to be.

I believe the crew cabs have even more American Parts and Assembly

 

First post here. Long story short, I've been following this thread for about 6 months, as I've got a shaker. Dealer does the usual, tires tires tires. Today I removed the rear drive shaft, put a bag over the transfer case output to catch most of the fluid that I knew it would sling, drove a couple of miles at the worst speeds for my vibration (45 and 65), and observed the vibration to be completely absent with the rear drive shaft removed.

 

I just finished refilling my transfer case, and am now thinking about where to go next with what I'm telling the dealer. I'm thinking it might be related to pinion angle.

Drive it into a ditch and have your insurance buy you something that actually works lol... seriously though, Pinion angle has been brought up alot, I don't remember anything specific about results from messing with it though.

Edited June 10, 2016 by Jesse D

[BO TIE 1]

First post here. Long story short, I've been following this thread for about 6 months, as I've got a shaker. Dealer does the usual, tires tires tires. Today I removed the rear drive shaft, put a bag over the transfer case output to catch most of the fluid that I knew it would sling, drove a couple of miles at the worst speeds for my vibration (45 and 65), and observed the vibration to be completely absent with the rear drive shaft removed.

 

I just finished refilling my transfer case, and am now thinking about where to go next with what I'm telling the dealer. I'm thinking it might be related to pinion angle.

Could be. But it could also be driveshaft or the differential.

Hopefully you have a good dealer that will work with you.

 

Sent from my VS990 using Tapatalk

[paxtonman]

Well after 6 months my ordered Sierra arrived to replace my second vibrator, interior color wrong, sun roof that was not ordered, spray in box liner which wasn't ordered, sticker $2,000 higher then the order sheet. And, you guessed it, vibrates worse then the POS I have now. Dealing with 2 Ford dealers and with a little luck will be rid of GMC and their POS trucks for the rest of my life in just a few days. UnFing believable, 3 in a row.

[Jesse Davidson]

Well after 6 months my ordered Sierra arrived to replace my second vibrator, interior color wrong, sun roof that was not ordered, spray in box liner which wasn't ordered, sticker $2,000 higher then the order sheet. And, you guessed it, vibrates worse then the POS I have now. Dealing with 2 Ford dealers and with a little luck will be rid of GMC and their POS trucks for the rest of my life in just a few days. UnFing believable, 3 in a row.

sorry man, thats terrible

[paxtonman]

Traded my POS today, officially a Ford owner, good luck everyone, and if anyone from GM ever reads these posts. Thanks For Nothing. I have made sure my 3 sons know all about the great GM support I had over the 13 months it took for me to finally bite the bullet and dump the pig.

[C6Bill]

Congrats on the new Ford, lets see some pics

[KingstonMom1976]

Mine is being traded in tomorrow. 2016 Acadia. I don't hate the brand but I sure as hell not chancing another truck until this issue is fixed. These are going to end up being useless in a few years once people start really complaining.

 

Your box is tuff...but she sure vibrates ;)

Edited June 12, 2016 by KingstonMom1976

[Snoringbear]

Traded my POS today, officially a Ford owner, good luck everyone, and if anyone from GM ever reads these posts. Thanks For Nothing. I have made sure my 3 sons know all about the great GM support I had over the 13 months it took for me to finally bite the bullet and dump the pig.

Curly Bill in Tombstone; "bye"

[OmniCamaro]

Why are you posting this in here. This is for shake and vib issues.

NOW I can unfortunately say I'm posting in the "correct" thread.

 

Brand new 2016 Silverado crew cab, short box, 2wd, 5.3L gas, with 20's.

 

Took it on a 1200 mile trip w/200 miles on it at home and our water bottles and human cargo were shaking at hwy speeds. Also, the electronic steering assist went out a few times at around 78mph. I'm guessing the vibrations were just too much for the steering computer to handle at those speeds. Just a guess.

We are at our vacation destination so I took it to a local dealer who did the usual checks for the steering issue and also road force balanced the tires. Took it out today for only a short ride at 75-80 and the vibration is still present although not as bad as before.

I'll be monitoring everything on our trip home and taking it in if it isn't to our liking.

I've got video of the vibrations as well as pictures of the power steering going out. Crazy stuff and I sure wish I'd have discovered this thread before purchasing.

Short video at hwy speed: https://youtu.be/bLdThKzOVzM

 

Picture of the steering problem (the camera "couldn't" take a clear picture because of the vibration) just FYI:

Edited June 12, 2016 by OmniCamaro

[dave07]

NOW I can unfortunately say I'm posting in the "correct" thread.

 

Brand new 2016 Silverado crew cab, short box, 2wd, 5.3L gas, with 20's.

 

Took it on a 1200 mile trip w/200 miles on it at home and our water bottles and human cargo were shaking at hwy speeds. Also, the electronic steering assist went out a few times at around 78mph. I'm guessing the vibrations were just too much for the steering computer to handle at those speeds. Just a guess.

We are at our vacation destination so I took it to a local dealer who did the usual checks for the steering issue and also road force balanced the tires. Took it out today for only a short ride at 75-80 and the vibration is still present although not as bad as before.

I'll be monitoring everything on our trip home and taking it in if it isn't to our liking.

I've got video of the vibrations as well as pictures of the power steering going out. Crazy stuff and I sure wish I'd have discovered this thread before purchasing.

Short video at hwy speed: https://youtu.be/bLdThKzOVzM

 

Picture of the steering problem (the camera "couldn't" take a clear picture because of the vibration) just FYI:

Wow that really sucks! Especially the steering.

 

I wanted to post this awhile ago so you guys can compare vibrations. I took the following video in my wife's Lexus at around 75mph. This is what your water bottles should look like at highway speeds:

 

My truck: https://youtu.be/-_l-ShqMLOA

For what it's worth I don't think my truck has a vibe problem, you decide.

 

Btw my truck MSRPs for about 3 grand more...

 

 

Sent from my iPhone using Tapatalk

Edited June 13, 2016 by dave07

[Gofas]

Maybe it's chararistic of the new steel in the frames. An old timer friend of mine been test driving trucks recently. He seems to think its the materials being used. He test drove dodge and Chevy gmc. And thinks the ride is horrible compared to old trucks. Dodge the worse he said.

If it's not shaking it vibrating he says.

After hearing his story I told him of our trucks and this thread.

Hopefully the new US made crew will have no more issues!

[tootall87]

6/3 - I get a call from dealer stating that after the last pico scope test GM wanted me to take my level kit off before they can proceed any further than tire diagnostic.

 

Annoying but alright, I'll play along. I took it off that weekend.

 

6/7 - Drop it off again. Gm - We're gonna pico it again oh and there's an engineer that will be here Friday (6/10) to look at yours and another truck with similar issues.

 

6/13 - We are waiting on a tool from GM for the balance machine that is hub mount rather than the traditional cone mount. Will re-pico after the balancing of tires is complete. Oh an the engineer never got a chance to look at your truck.

 

You've got to me !Q$#^%$ kidding me. You've had it a week and have done nothing.

 

GM has replaced 3 of my 4 original tires, swapped two more complete set of tires of different brand/sizes and have balanced tires I believe a total of 8 times now. It's been at the dealer a total of 36 days from purchase focusing mainly on tire analysis.

 

IT'S NOT THE @#$%%^$# TIRES.

[14silverado4.3]

6/3 - I get a call from dealer stating that after the last pico scope test GM wanted me to take my level kit off before they can proceed any further than tire diagnostic.

 

Annoying but alright, I'll play along. I took it off that weekend.

 

6/7 - Drop it off again. Gm - We're gonna pico it again oh and there's an engineer that will be here Friday (6/10) to look at yours and another truck with similar issues.

 

6/13 - We are waiting on a tool from GM for the balance machine that is hub mount rather than the traditional cone mount. Will re-pico after the balancing of tires is complete. Oh an the engineer never got a chance to look at your truck.

 

You've got to me !Q$#^%$ kidding me. You've had it a week and have done nothing.

 

GM has replaced 3 of my 4 original tires, swapped two more complete set of tires of different brand/sizes and have balanced tires I believe a total of 8 times now. It's been at the dealer a total of 36 days from purchase focusing mainly on tire analysis.

 

IT'S NOT THE @#$%%^$# TIRES.

What is scary is the balancing machine did not have a tool to balance hub centric....

[pm26]

Well after 6 months my ordered Sierra arrived to replace my second vibrator, interior color wrong, sun roof that was not ordered, spray in box liner which wasn't ordered, sticker $2,000 higher then the order sheet. And, you guessed it, vibrates worse then the POS I have now. Dealing with 2 Ford dealers and with a little luck will be rid of GMC and their POS trucks for the rest of my life in just a few days. UnFing believable, 3 in a row.

I think you should have given them a fourth chance.

[Wrench589]

6/3 - I get a call from dealer stating that after the last pico scope test GM wanted me to take my level kit off before they can proceed any further than tire diagnostic.

 

Annoying but alright, I'll play along. I took it off that weekend.

 

6/7 - Drop it off again. Gm - We're gonna pico it again oh and there's an engineer that will be here Friday (6/10) to look at yours and another truck with similar issues.

 

6/13 - We are waiting on a tool from GM for the balance machine that is hub mount rather than the traditional cone mount. Will re-pico after the balancing of tires is complete. Oh an the engineer never got a chance to look at your truck.

 

You've got to me !Q$#^%$ kidding me. You've had it a week and have done nothing.

 

GM has replaced 3 of my 4 original tires, swapped two more complete set of tires of different brand/sizes and have balanced tires I believe a total of 8 times now. It's been at the dealer a total of 36 days from purchase focusing mainly on tire analysis.

 

IT'S NOT THE @#$%%^$# TIRES.

What is the difference between the "traditional cone mount" and "hub mount"? Same thing,market they? There is really only two centering designs for automotive wheels - hub centric and lug (wheel bolt) centric. The centering come on a balance machine would centre the wheel to the centre bore in the wheel, which would be the bore that the hub would also fit snug to to centre the wheel. Alternately, lug centric uses the tapered lug nuts to centre the wheel, with the wheel centre bore being larger that the axle hub.

 

Or you could be like GM, and have the wheel bore snug to the hub (hub centric) and use tapered lug nuts (lug centric) and see who wins the centering fight!!

 

Now, there are different centering cones for the Hunter balance machine. Likely they didn't have the correct one for aluminum wheels on your truck. As I recall, it's some kind of "reverse" cone arrangement. Sounds funky, and like anything else funky, can be a source of human error. Just saying......

Edited June 14, 2016 by Wrench589