Shake or Vibration Issues

[PMurray]

Mid-speed (40-50) vibe = rear diff out of spec. Low (or no) speed and high speed, if not tires or wheels, anyone's (including GM) guess.

[Retired Bob]

http://sandyblogs.com/techlink/?p=4689

 

"GM has begun shipping the CH-51450-A NVH Kit as an essential diagnostic tool to all GM dealerships. Shipments will continue through July 2015.

 

To assemble the NVH diagnostic kit, GM partnered with Pico Technology to develop a GM-specific, 4-channel, PC-based automotive oscilloscope with NVH vibration diagnostics and driveline balancing capabilities. The tool is designed to help identify the slightest chassis & driveline disturbances on today’s increasingly sophisticated vehicle architectures.

 

The CH-51450-A Kit includes a 3-axis accelerometer and interface to provide accurate analysis of vibrations in all directions. Using the display of your existing laptop computer, this system combines fast capture and analysis of vehicle data with a clear easy-to-read presentation of results and actions. Recordings can be captured while on a road test for analysis as well as saved to the laptop’s hard drive for further review back at the dealership. The CH-51450-A Kit contains a 3-axis accelerometer, whereas the original CH-51450 kit includes a single-axis accelerometer."

 

Could this be useful?

[albe1234]

I have a 2014 Silverado double cab, standard bed, 2-wheel drive with 5.3 engine and 3.42 gears, Has vibration in floor board and gas pedal at most speeds. 40 to 65 mph. Started at about 1800 miles and now has a little over 9,000 miles due to a 4300 miles road trip last Fall. Dealership replaced about 4 tires, road forced balanced all tires a few times, replaced front shock assemblies and also replaced complete rear assembly. Still have vibration. GM field engineer test drove truck with PICO analyzer and said all was within specs.

I did the BBB thing and had my hearing last week. Field engineer and an engineer from the Dallas area plant were there plus a representative from Chevrolet was on a speaker phone. The BBB arbitrator drove the truck for about 20 minutes. At the "wrap-up", GM people said everything was within spec and no safety issues were involved. The arbitrator said he would give his findings in about three days. I received the results/findings this a.m..

The arbitrator did not feel any vibrations while driving. Vehicle replacement was denied.. Also, since the dealership provided a loaner/rental vehicle for most of the 55 days at the dealership (about 6 trips), my truck does not qualify under Texas lemon law!

Of course I am not happy with their findings. I also was not aware of the Texas lemon law deal. That does not make any sense to me. I did check that on the internet and it is a fact that if the dealer ship supplies a loner or rental vehicle, those days do not count.

GM wins again!!!

Al

[1997SierraSLT]

GM writes the allowable vibration specs so it's no wonder these trucks are miracuously within tolerance. No oversight and accountability = increased profit margin.

 

Wonder what the NHTSA website looks like with regards to these vibration issues. I can only imagine GM is paying them off handsomly to bury the complaints.

[Enforcer]

Assuming the truck does not vibrate itself apart at 40K to 50K when the tires are shot and due for replacement, what is the consumer to do if they want to go down to their local Costco or some other tire shop for a replacement? Somehow I don't think the tire shops will swap out tires and perform numerous attempts to balance tires free of charge because the these trucks continue to experience vibration issues.

Oh there is more then just tire issues down the pipe on this !

 

It seems like everyday more and more people are becoming aware of this, but GM

A buddy that works for a non GM dealer will not take any '14 & '15 half ton GM trucks on trade as they are concerned

about not only safety issues but keeping customers plus they can not afford the time in service to chase down

a design flaw.

[300ktm]

I did the bbb deal didn't get any where waste of time the arbitrator did feel the vibration in the steering wheel ,gas padle and seat and rust on the frame but since there was no safety concerns at this time I got denied but I can still do the lemon law am I am GM HAS BIG POCKETS TO COVER THEIR @$$

[Adster]

Well there is hope boys! Just got my 14 Sierra Crew SLT back yesterday and I'm tentatively calling it fixed (95% sure, have to drive it more to be sure).

 

It had a vibration only in the steering from 65-75kph originally. First service they replaced 2 tires and returned it with a worse vibe. 2nd service they replaced another tire and returned it slightly improved but not as good as it was originally. 3rd service they replaced the drive shaft, returned it with a dramatically worse vibration 60-80kph, that could be felt in the whole truck and a slight vibe at nearly all speeds.

 

So then I went in and ranted at the service manager for 20 minutes about a week after 3rd visit. He booked it in for the next day, then the service level improved quite a bit. Had a loaner waiting for me.

 

They had it for 11 days (due to waiting for parts) and replaced the rear diff gear case, crown and pinion gears and bearings. I believe they also rebalanced the drive shaft or possibly put the old original one back on. Boom, they got it, after I had lost all faith in them they turned around and redeemed themselves. I don't know if I'll ever think highly of GM again though, that's kind of ruined for me.

 

Also had them apply the headlight upgrade while it was in, it's a noticeable improvement I'd say.

 

So now after 2 months of dicking around with that I think I'm a happy camper, fingers crossed. Truck has 3800km on it now, was built and purchased in Sept/14.

[jcronin83]

Well just got a call that now they want to replace motor. Only has 1200 miles can not find the issue the tech working on my truck got so mad he quit. Now headed there to talk to them and general manager and gm rep.

[BluByU14]

Well just got a call that now they want to replace motor. Only has 1200 miles can not find the issue the tech working on my truck got so mad he quit. Now headed there to talk to them and general manager and gm rep.

 

Wow.... I dont know which is more shocking.....being told they have to replace your engine or being told that the dude working on your truck got so frustrated that he quit. Good luck, sounds like you have a good case for a buy-back with only 1200 miles on the odometer.

[kapa32]

I have a 2014 Silverado z71, has had the driveline vibration since brand new. Went to dealer at 1200 miles, was told no fix and to keep driving it. Had a shop install a 3.5" lift and now GM won't even touch it. I have bought GM trucks for the past 20 years, and this will be my last. I will never own another GM product again. Beware to all who buy the new truck. Please test drive them for vibration before purchase!

[Enforcer]

Well just got a call that now they want to replace motor. Only has 1200 miles can not find the issue the tech working on my truck got so mad he quit. Now headed there to talk to them and general manager and gm rep.

TOTALLY UNREAL

 

Just an FYI, Keep all of your paper work in order, if anyone makes any statements record what was said along

with the date and time !

 

It would be interesting to see the paper work flow and just why and who OK'd this massive job, had you noticed any

engine related problems ?

 

I had issues with a noisy engine @ idle GM deemed it ' Normal ' also my RPM's would go up 300 before it would shift

into a higher gear, again ' Normal ' from the GM guru's I'll assume that my constant questioning every step

may led them to believe if they ever fixed the vibration the engine and transmission issues were next to be

dealt with

 

Good Luck !

[Enforcer]

I have a 2014 Silverado z71, has had the driveline vibration since brand new. Went to dealer at 1200 miles, was told no fix and to keep driving it. Had a shop install a 3.5" lift and now GM won't even touch it. I have bought GM trucks for the past 20 years, and this will be my last. I will never own another GM product again. Beware to all who buy the new truck. Please test drive them for vibration before purchase!

So sorry to read this

 

I do feel your pain, I worked for Chevrolet for 20yrs and they treated me like dirt.

 

I have one GM vehicle left, and if I did not enjoy it so much it would be history

[jcronin83]

Well looks like they might have a fix. And its in the form of a 2015 camaro ss. I am so afraid of getting another truck and having same issue or issue that all of you are having. Drove almost every style at dealership and just love the power. They also are going to reimburse my first payment and try to help on some of money already invested in truck. Lowering,tint,taillights,and detail. But not 100% done yet. Until I have signed papers in front of me we will see

[z28clark]

I've been following this thread off and on since it was about 40 pages. After a year of going back and forth with the dealer they finally got the truck fixed. Had a vibe from 40-50 in steering wheel (felt only under no load, ie coasting down hill) a complete new rear differential seems to of taken care of it. I had a hard time believing a bad rear differential would cause a steering vibration, but it appears so. Good luck to the others fighting with GM, don't give up and be relentless - paid too much money for a truck for it to not be 100% right.

[Enforcer]

Well looks like they might have a fix. And its in the form of a 2015 camaro ss. I am so afraid of getting another truck and having same issue or issue that all of you are having. Drove almost every style at dealership and just love the power. They also are going to reimburse my first payment and try to help on some of money already invested in truck. Lowering,tint,taillights,and detail. But not 100% done yet. Until I have signed papers in front of me we will see

This is where I really got shafted was the ' ADDS ' even after I gave them six weeks and drove seven

Silverado's all that vibrated, they could not produce a half ton with out this issue. I have other cars, what

I needed was a truck that preformed with out having to fight with GM who always seemed to have that

Deer in the headlight look and attitude.

 

They will want all of the original receipts, and they in some cases screw with the labor and tax's also

keep an eye on how they present the final numbers, they tried to pass one number on me then it took

an addition week for them to get a brake down. also tax's and plates should be included in this.

 

Also make sure that there is a notary at the dealership if you ever get to this point and have them make

double copies of everything for you including all service records on your truck.