Shake or Vibration Issues

[GMCustomerService]

Hello Puckstop,

I am sorry to hear you are experiencing these concerns with your Yukon. Though, it’s good to see you have brought it into a GM dealership to get it serviced. I would be more than happy to offer additional assistance if you need any when working with your dealership. Please private message me with more details if this interests you.

All the best,

Julianne M.

GM Customer Care

 

 

Just dropped off my 2015 Yukon for a vibration in the rear. Noticed it the day I drove off the lot. It wasnt entirely consistent but started at 70mph thru about 80mph. I figured it was just a tire balance issue until my service advisor called me today and told me it was a known problem and they would do what they can. I have 2 other issues with it as well; the bottom 3rd of the radio/gps display will flicker from time to time and when I plug a phone into the usb ports, I get a frequency feedback thru the radio. Tried multiple cords and phones with same result. Anyone else have similar issues?

[dbt1127]

traded in my '14 double cab for a '16 crew cab last week....left the dealership and about 10 minutes later noticed a horrible shake vibration when in Drive stopped at a red light. Truck had 15 miles on it....ugh.

nasty nasty rough idle.

 

Took it in on yesterday morning, they spent the day doing repair PIP5211D, replacing motor mounts and adding shims. Seemed to do the trick. Drove for about 40 minutes in stop and go traffic. No vibration or shake when idling......until the 45 minute mark. It's back. Not as bad, but still very noticeable. I'll see how the drive home goes, but I have a feeling I'll be bringing it back sometime this week.

 

THE FRUSTRATION!!!!!

Well, turns out after driving for 10 minutes or so, the rough idle returns. Looks like I'll be taking it back to the dealer again this week. Not looking forward to them telling me this is normal. My '14 did not do this.....

[KingstonMom1976]

Fully boxed frame

Newly designed cab mounts

New cab design

 

Just a few big ones

Did the steering system not change as well? I thought it went from a rack and pinion type to what is on it now...could be wrong but it looks different to my inexperienced eyes

[rpoffen]

The power assist is via an electronically controlled motor, not hydraulic by a belt driven pump.

[Jesse Davidson]

Ok, so as promised I went to a local tire shop (anyone in the northeast you probably know Sullivan Tire) I didn't have them change any balancing or anything. I just merely wanted confirmation that the tires & rims are true and in good standing.

heres the results :

 

Tire Location: inner weight reading outer weight reading RFB number

LF needs another 1/4 oz perfect 23 lbs

LR perfect perfect 25 lbs

RF needs another 3/4 oz perfect 25 lbs

RR needs another 1/2 oz perfect 21 lbs

 

By both GM and Sullivan Tire standards these tires meet spec. although a 25lb rfb number is the upper limit for GM, industry standard is 30lb. Because the truck still vibrates, we now have definitive proof it is not related to the tires, although properly balanced and lower rfb numbers do help to reduce it.

 

One of the guys I spoke with at Sullivan Tire knows quite a bit about the Vibration issue, saying that they have a few sources within GM itself, and the Engineers there really have no idea why the trucks are doing it, and that they know its a big issue.... just some food for thought.

[14silverado4.3]

Ok, so as promised I went to a local tire shop (anyone in the northeast you probably know Sullivan Tire) I didn't have them change any balancing or anything. I just merely wanted confirmation that the tires & rims are true and in good standing.

heres the results :

 

Tire Location: inner weight reading outer weight reading RFB number

LF needs another 1/4 oz perfect 23 lbs

LR perfect perfect 25 lbs

RF needs another 3/4 oz perfect 25 lbs

RR needs another 1/2 oz perfect 21 lbs

 

By both GM and Sullivan Tire standards these tires meet spec. although a 25lb rfb number is the upper limit for GM, industry standard is 30lb. Because the truck still vibrates, we now have definitive proof it is not related to the tires, although properly balanced and lower rfb numbers do help to reduce it.

 

One of the guys I spoke with at Sullivan Tire knows quite a bit about the Vibration issue, saying that they have a few sources within GM itself, and the Engineers there really have no idea why the trucks are doing it, and that they know its a big issue.... just some food for thought.

I could have went to the Adult Mart and spent $30 to have the same tingling in my ass!

[steelcity]

I could have went to the Adult Mart and spent $30 to have the same tingling in my ass!

In your ass? Wouldn't ya rather go to the Adult Mart and get a tingling on the johnson?

[FogDucker]

Ok, so as promised I went to a local tire shop (anyone in the northeast you probably know Sullivan Tire) I didn't have them change any balancing or anything. I just merely wanted confirmation that the tires & rims are true and in good standing.

heres the results :

 

Tire Location: inner weight reading outer weight reading RFB number

LF needs another 1/4 oz perfect 23 lbs

LR perfect perfect 25 lbs

RF needs another 3/4 oz perfect 25 lbs

RR needs another 1/2 oz perfect 21 lbs

 

By both GM and Sullivan Tire standards these tires meet spec. although a 25lb rfb number is the upper limit for GM, industry standard is 30lb. Because the truck still vibrates, we now have definitive proof it is not related to the tires, although properly balanced and lower rfb numbers do help to reduce it.

 

One of the guys I spoke with at Sullivan Tire knows quite a bit about the Vibration issue, saying that they have a few sources within GM itself, and the Engineers there really have no idea why the trucks are doing it, and that they know its a big issue.... just some food for thought.

Interesting. My dealership told me tag 15lbs RF was the target for K2xx trucks. They even replaced 6 tires to get them all under that.

 

This did resolve my 'buffeting', not the vibration which was fixed with a complete rear end exchange. [not in any way related to the last couple of posts referencing rear ends] ;)

[oneandzero]

Interesting. My dealership told me tag 15lbs RF was the target for K2xx trucks. They even replaced 6 tires to get them all under that.

 

This did resolve my 'buffeting', not the vibration which was fixed with a complete rear end exchange. [not in any way related to the last couple of posts referencing rear ends] ;)

My dealer said the same thing, 15lbs.

[Jesse Davidson]

Interesting. My dealership told me tag 15lbs RF was the target for K2xx trucks. They even replaced 6 tires to get them all under that.

 

This did resolve my 'buffeting', not the vibration which was fixed with a complete rear end exchange. [not in any way related to the last couple of posts referencing rear ends] ;)

 

 

My dealer said the same thing, 15lbs.

I've never heard 15 lbs ever, thats half the industry standard

[FogDucker]

 

 

I've never heard 15 lbs ever, thats half the industry standard

And I've never owned a vehicle that required road force balancing!

[Wrench589]

Ok, so as promised I went to a local tire shop (anyone in the northeast you probably know Sullivan Tire) I didn't have them change any balancing or anything. I just merely wanted confirmation that the tires & rims are true and in good standing.

heres the results :

 

Tire Location: inner weight reading outer weight reading RFB number

LF needs another 1/4 oz perfect 23 lbs

LR perfect perfect 25 lbs

RF needs another 3/4 oz perfect 25 lbs

RR needs another 1/2 oz perfect 21 lbs

 

By both GM and Sullivan Tire standards these tires meet spec. although a 25lb rfb number is the upper limit for GM, industry standard is 30lb. Because the truck still vibrates, we now have definitive proof it is not related to the tires, although properly balanced and lower rfb numbers do help to reduce it.

 

One of the guys I spoke with at Sullivan Tire knows quite a bit about the Vibration issue, saying that they have a few sources within GM itself, and the Engineers there really have no idea why the trucks are doing it, and that they know its a big issue.... just some food for thought.

Don't quote me on this, but I think 25lb is the normal GM limit, but one of the TSBs on this vibration issue says that for trucks and SUVs with vibration and/or booming-pressure issues, to apply a lower RF limit 15 lb I believe).

 

One thing I haven't seen anyone posting is if the results of there RF is 1st order, 2nd order, or 3rd order. I am pretty sure that the Hunter machine will measure all three orders and report if the operator sets the machine to do so. If not, I think the default is to report 1st order only. And, I believe same applies to the balancing: 1st, 2nd and 3rd can be measured, but not by default. So, I wonder if if something is being missed if the shops are only looking at 1st order on the Hunter machine?

 

Also, don't forget, it is not a Road Force Balance! Balancing is a totally separate step and consider mass unbalance, not Road Force Measurement. High Road Force cannot be corrected with weights. Correction can only be done by indexing the tire differently on the rim,mswitching the tire to a different rim, or replacing the tire. In some case, the RF will be what it is. So, the shop can't always correct it, short of going through a stack of new tires until they find a good one. And that assume the issue isn't the rim itself, which can also generate a high RF (but that easy yo catch by measuring the TIR of the rim without the tire on it. Assuming the shop biters to do so. Another step in the flat rate work they are doing!)

 

Of course, we all know there does not seem to be any other vehicle that requires such perfectly balanced wheels and tires with such low RF values, so there is no doubt these vehicles are way too sensitive and that is the real problem, not the tires. But, changing tires is all GM can do, since they obviously have not discovered the real "defect", or they have and realize it s not possible, or practical, or economical to correct it.

[C6Bill]

Well if they really did know the root cause you would think they would have fixed it on new trucks coming off the line. But that doesn't seem to be the case.

 

And am I the only one who had never heard the term road force balance before 2014 ?

[14silverado4.3]

Don't quote me on this, but I think 25lb is the normal GM limit, but one of the TSBs on this vibration issue says that for trucks and SUVs with vibration and/or booming-pressure issues, to apply a lower RF limit 15 lb I believe).

 

One thing I haven't seen anyone posting is if the results of there RF is 1st order, 2nd order, or 3rd order. I am pretty sure that the Hunter machine will measure all three orders and report if the operator sets the machine to do so. If not, I think the default is to report 1st order only. And, I believe same applies to the balancing: 1st, 2nd and 3rd can be measured, but not by default. So, I wonder if if something is being missed if the shops are only looking at 1st order on the Hunter machine?

 

Also, don't forget, it is not a Road Force Balance! Balancing is a totally separate step and consider mass unbalance, not Road Force Measurement. High Road Force cannot be corrected with weights. Correction can only be done by indexing the tire differently on the rim,mswitching the tire to a different rim, or replacing the tire. In some case, the RF will be what it is. So, the shop can't always correct it, short of going through a stack of new tires until they find a good one. And that assume the issue isn't the rim itself, which can also generate a high RF (but that easy yo catch by measuring the TIR of the rim without the tire on it. Assuming the shop biters to do so. Another step in the flat rate work they are doing!)

 

Of course, we all know there does not seem to be any other vehicle that requires such perfectly balanced wheels and tires with such low RF values, so there is no doubt these vehicles are way too sensitive and that is the real problem, not the tires. But, changing tires is all GM can do, since they obviously have not discovered the real "defect", or they have and realize it s not possible, or practical, or economical to correct it.

And with that being said, if you buy tires, I would suggest at the dealership.

 

No tire shop is going to replace a tire that has a RFB of 30. And your local GM service department will tell you that they can't fix the vibration because it is the tires and since you did not buy them there they will have to charge you to get them to 15. If they cant get 15, then you are stuck fighting the tire shop who is going to tell you to fly a kite.

 

At least if you get them at the dealership, the burden of finding you good tires lies with the dealership. Who must supply to GM specifications...

 

OMG - I just had a thought, alarming but....

 

I believe if GM or any manufacturer requires you to purchase a specific product or specification for your vehicle or it will not run properly- they have to supply them. Does anyone know that law?

[14silverado4.3]

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.