Shake or Vibration Issues

[rb555]

I have a 2014 Silverado LTZ with 20" Continental tires that I picked up in the middle of November 2014. After a day or so I noticed the vibration after 65 MPH and thought the tires needed re-balancing, I figured I'd mention it at first oil change. mine wasn't as bad as the one's I've seen on the you tube video's but there was a distinct vibration. I now have about 3,700 miles on the truck, and the vibration is just about gone... It seems the more i drove the truck in 4WD or auto 4W the better it got. (We got a lot of snow here in New England.) I just got back from a 200 mile road trip and my passengers were saying .. wow!! this truck rides so smooth. At first I was real disappointed with this truck and thought I was going to have to fight with the dealer to correct it. Now I don't think I'm even going to mention it... My truck runs perfect and I'm happy with it.. Just throwing this out there..

[MrRotorsports]

I am pleased to report that my vibration is fixed, at least for now. Last Wednesday morning I dropped off the truck for it's second evaluation. My dealership had purchased a "Pico" meter (not sure of the correct spelling) that helps them locate the source of a vibration. They pinpointed the driveshaft as the main source so they replaced it. Apparently it was a lot better but they still were not fully satisfied so they also ended up replacing two tires while they had it there. I returned last night from a 1700 mile trip (SC to Miami and back) and it was an absolute pleasure driving this truck. Of course I was expecting it to start vibrating again halfway there but it did not. There was not a hint of vibration at any speed and I even managed to knock down 19.1 mpg with the cruise set at 80 mph all the way there and back. Hopefully it does not reappear in the future but for now at least, I love this truck again. Now I finally feel confident enough to start accessorising it. I have the Bakflip F1 and BedSlide coming tomorrow, and the 3/5 drop, Borla Touring and 22s are next.

 

For those of you dealing with this I would ask your dealer about this Pico meter. Again, not sure I have the spelling or name correct but it was a device that GM Engineering reccomended the dealer use for analyzing. They said they had another truck that was vibration in the 35 - 40 range and the meter pinpointed driveshaft vibration on that one as well. I guess they now have two happy customers, and I'm glad to be one of them. I sooooo did not want to have to drive a Ford or Dodge!

[ss2nv]

Add me to the list of "vibrators". 2015 Sierra SLT with 1000 miles. Dealer has had truck for going on 5 weeks ! Just one of many complaints. Garbage 50k+ truck.

[Retired Bob]

Just saw that there is a bulletin "Vibration Analysis Worksheet" 03-00-91-001G for 2015 trucks and earlier. I don't know what this is about because I have not see this 'worksheet', but the title seems to apply to the vibration issue. Dealers will normally show these document to you if you ask. If you read the 'worksheet' and find some useful info - post what you find.

[pm26]

Add me to the list of "vibrators". 2015 Sierra SLT with 1000 miles. Dealer has had truck for going on 5 weeks ! Just one of many complaints. Garbage 50k+ truck.

Did they give you a "loaner" to drive?

Edited February 18, 2015 by pm26

[pm26]

 

For those of you dealing with this I would ask your dealer about this Pico meter. Again, not sure I have the spelling or name correct but it was a device that GM Engineering reccomended the dealer use for analyzing. They said they had another truck that was vibration in the 35 - 40 range and the meter pinpointed driveshaft vibration on that one as well. I guess they now have two happy customers, and I'm glad to be one of them. I sooooo did not want to have to drive a Ford or Dodge!

Most likely it was a Pico Scope, like this one:

http://www.testandmeasurementtips.com/oscilloscopes/picoscope-4424-ideal-for-noise-vibration-mechanical-analysis

[nashvilleGMC]

 

You may want to post your question over on the SUV threads. Your issue may be the same as the this one:

http://www.gm-trucks.com/forums/topic/162779-2015-yukon-noise-in-cabin/

 

Just curious - why would they have had to replace the headliner to fix a water leak on the side window? Seems odd.

 

The water leak was in the back right stationary window. There's an antenna in the window, and it was causing the leak, they tell me. The leak left a water stain in the headliner, so they replaced the whole thing. One of the panels popped off a couple weeks later, and I took it in to get them to pop it back in place.

[Newm]

I am pleased to report that my vibration is fixed, at least for now. Last Wednesday morning I dropped off the truck for it's second evaluation. My dealership had purchased a "Pico" meter (not sure of the correct spelling) that helps them locate the source of a vibration. They pinpointed the driveshaft as the main source so they replaced it. Apparently it was a lot better but they still were not fully satisfied so they also ended up replacing two tires while they had it there. I returned last night from a 1700 mile trip (SC to Miami and back) and it was an absolute pleasure driving this truck. Of course I was expecting it to start vibrating again halfway there but it did not. There was not a hint of vibration at any speed and I even managed to knock down 19.1 mpg with the cruise set at 80 mph all the way there and back. Hopefully it does not reappear in the future but for now at least, I love this truck again. Now I finally feel confident enough to start accessorising it. I have the Bakflip F1 and BedSlide coming tomorrow, and the 3/5 drop, Borla Touring and 22s are next.

 

For those of you dealing with this I would ask your dealer about this Pico meter. Again, not sure I have the spelling or name correct but it was a device that GM Engineering reccomended the dealer use for analyzing. They said they had another truck that was vibration in the 35 - 40 range and the meter pinpointed driveshaft vibration on that one as well. I guess they now have two happy customers, and I'm glad to be one of them. I sooooo did not want to have to drive a Ford or Dodge!

 

Glad they got it figured out for you. What was your vibration like? Highway speeds only? Seat of the pants, steering wheel, floorboard. etc...?

[CounterMeasure]

The Picometer is the vibration reading device the GM TSB specifically calls out to use in order to give the dealer an idea of what is actually vibrating. The TSB lists where to attach the device in one of two places, and also goes as far as to list the frequencies for vibration and what can cause each of them. If a dealership doesn't have the device, then they are not following the TSB to fix the issue, and likely just wasting time throwing parts at the truck hoping it fixes it.

 

I know of one dealership in central Texas that has one, yet hasn't trained anyone to use it to follow the TSB. And they have two trucks they can't figure out what's causing the vibrations...

[MrRotorsports]

Hi Newm. My vibration only occurred between 73 - 82 mph. It didn't matter how I drove it or what the road surface or road conditions were. It was very noticable in the steering wheel and seat bottom. If you had a drink in the cup holder you could see the rapid vibration in the bottle, to the point it "rattled" and annoyed you. It feels like a whole new truck now - just like it should have when I bought it new a few weeks ago. Go figure...

[ss2nv]

Did they give you a "loaner" to drive?[/quote

 

Yes, gave me a watered down Buick that I can barley get out of my 800' country driveway. Absoutely livid. GM owes me some serious compensation. Dealer has had it longer then I have. If there's so much as a scuff or scratch on it if I ever see it again, I don't want it back. Will go straight to BBB and my wife is a attorney, has connections ... I'll esclate the situation to the moon.

[20L8TSierra24]

"Auction" on their own used car lot, with "certified used" slapped on the window, waiting for the next sucker to come in and pay premium price for it. And the cycle continues.

 

Exactly what they did with my bought back truck...

[greenbar]

I've read over a lot of the posts from this page, and it seems what I have going on is slightly different.

 

My truck rides fine at high speeds, no shacks or rattles. It's low speed, mostly low or light throttle that I get a almost "torque converter" feel like it's slipping slightly in and out. my passenger can't feel it, but I feel it in the pedal and in the driveline.

 

Is this common or considered "acceptable" ? I don't know if it's maybe my truck needs to be broken in (350 miles on it ) or what.

 

Any advice would be great.

 

2015 Sierra SLE with 20" wheels

[Aaron1085]

Looks like I'll be bringing this bulletin and tool to front and center and my local dealer. Still vibrating.

 

 

Sent from my iPhone

[CounterMeasure]

Looks like I'll be bringing this bulletin and tool to front and center and my local dealer. Still vibrating.

 

 

Sent from my iPhone

 

If the dealer doesn't know about this tool, the equipment part number is 733-CH-51450, known as "Pico Oscilloscope Diagnostic Kit with NVH".

Edited February 19, 2015 by CounterMeasure