Shake or Vibration Issues

[taf2179]

I know how gm works I have worked for them for 16 years. That's why I want my truck fixed not a new one.

[MudMutt]

What the heck are "Eco plus" tires? Low rolling resistance or something? Somewhat of an oxymoron with heavy 20 inch diameter rims.

The Conti's were on the truck when I bought it last month ... truck only had 49 miles on it when I picked it up ... It came from another dealer in the area so they drove it over to where I purchased it. I have been reading tons of post on this site and never saw anyone with these tires on their truck. That's why I was asking if anyone had a problem with them being out of balance ... like I said, my Vibration is not real bad and very intermittent.

[lineman12345678]

My 2014 GMC Sierra SLT shakes/vibrates when I tow my travel trailer. It has done it since new when I took it out with only 150 miles on the truck. If I ease into the throttle you don't notice it but if your start from a dead stop and hammer the throttle it will shake through the firs few gears. Other then that issue I don't notice a shake any other time. I am hooking up my 27' travel trailer in the morning and have an appointment with my dealer to check it out. It is definitely something related to the power train. If I never towed I wouldn't have know about the issue. I let you know what they say.

So the tech said that my transmission has a technician bulletin out on it to repair something with the internal pump pressure that causes a shutter under hard acceleration. He is ordering the parts and it will go in next week for repair.

[Silverado 6.2]

So the tech said that my transmission has a technician bulletin out on it to repair something with the internal pump pressure that causes a shutter under hard acceleration. He is ordering the parts and it will go in next week for repair.

My truck with the 6.2 max trailering pack has that shutter also on hard acceleration in first and second gear, mine also has a tranny pump whining noise that is loud when the tranny is cold and gets a little better as the tranny warms up. Does yours have the whining noise?

[lineman12345678]

My truck with the 6.2 max trailering pack has that shutter also on hard acceleration in first and second gear, mine also has a tranny pump whining noise that is loud when the tranny is cold and gets a little better as the tranny warms up. Does yours have the whining noise?

I don't have a whining noise yet. I wouldn't notice if I didn't pull my travel trailer. It is very slight during everyday driving.

[pm26]

It really does look like many of these vibration issues are caused by poorly assembled rear differentials and transmissions, badly assembled drive shafts and a number or loose fasteners in chassis components.

Edited October 23, 2014 by pm26

[keakar]

It really does look like many of these vibration issues are caused by poorly assembled rear differentials and transmissions, badly assembled drive shafts and a number or loose fasteners in chassis components.

the common denominator in all of this is everything on these trucks has issues due to lowest bidder parts that don't work well together along with very poor or non existant quality control or oversight of the assembly process, I mean some people are even find the beds are mounted on crooked on their trucks!

 

that's what you get when the government decides who is going to run a car manufacturing company and lets the unions make all the decisions on how and where to build them

 

its government run motors at its best

Edited October 23, 2014 by keakar

[skylineflyer]

Here is my update.

 

I have been to the dealer that I purchased my 2014 Silverado Crew Cab LT 4x4 5.3 FOUR times now. First time, they replaced one tire. Second time, they road forced balanced my tires AGAIN. 3rd time I took the Service Manager for a ride. 4th time was to get all new tires. They put on Michelin tires this time. 265/65/18's. I still have the shake, however the speed at which it comes has moved now. It used to come around 72 mph. Now I can feel it intermittently starting around 45mph all the way past 80mph. Two weeks ago I wrote a letter to the head honcho of GM and I guess she just forwarded my letter to a rep. This rep called Monday and asked for my VIN #. I asked her that before I give it to her, would she tell me whether or not she has heard of this problem and she said yes. I was like, great, Maybe I'll get somewhere with her then. I also said that I heard that once we give our VIN #'s to GM that we would basically be blackballed from all dealerships regarding this problem. She said she never heard of that and that she would do her best to ensure that this would be taken care of. She looked up my VIN# and said that there was a recall on my vehicle for a shudder in my tranny and also wanted to make sure that I understood that my Service Manager had not reported any of these problems to them, nor has he been in contact with GM. She said he also has not performed the recall that dates back to June. Today she called back. This time, she had informed me that the call was being recorded. Her demeanor had totally changed. CRAPPPPPPPPP! I knew I was doomed. She said that she contacted a closer dealership and that the service manager of that dealership would be in contact with me. She also told that service manager what my previous service manager had performed. He told her that those would of been the steps that he would of done. After she was done talking to me, I got a phone call from this new service manager. Right off the bat, he wanted to tell me that this shaking was a normal characteristic of a Silverado. That got my blood boiling as I thought that I might actually have an advocate on my side. I told him that if I was to come into his dealership it would be to get this fixed. If he was going to just look at the tires and nothing else, that he would be wasting my time. His attitude got worse and said for me not to come in as he would be just wasting my time.

 

 

Now where do I go? I've had this truck for a little over a month and have racked up 5600 miles. Good lord I drive a lot.

 

I feel like my truck is struggling to stay at a constant speed now and I'm getting this whurrrring sound coming out of the drive train that comes and goes about every 2 seconds.

[skylineflyer]

the common denominator in all of this is everything on these trucks has issues due to lowest bidder parts that don't work well together along with very poor or non existant quality control or oversight of the assembly process, I mean some people are even find the beds are mounted on crooked on their trucks!

 

My bed was on crooked. I had to have it realigned, but now the bumper (because its not adjustable) is not centered on the rear of the bed. LOL. All I can do is laugh as I'm seriously going mental and mad regarding this truck.

[skylineflyer]

It really does look like many of these vibration issues are caused by poorly assembled rear differentials and transmissions, badly assembled drive shafts and a number or loose fasteners in chassis components.

So how do you convince a service manager to look at something like the rear diff when they insist its just a normal characteristic of this truck.

[keakar]

 

My bed was on crooked. I had to have it realigned, but now the bumper (because its not adjustable) is not centered on the rear of the bed. LOL. All I can do is laugh as I'm seriously going mental and mad regarding this truck.

its getting where those with unfixable vibrations are going to be the lucky ones because they can at least get out of these turds at some point, even if does feel like it takes forever

[skylineflyer]

its getting where those with unfixable vibrations are going to be the lucky ones because they can at least get out of these turds at some point, even if does feel like it takes forever

How is it that I'm lucky? How do I get out of this? By dying?

[Mickey_D]

I have a 14' Sierra regular bed crew cab 4x4 that seems to have two sources of vibration, the lovely Good Year tires, and the engine when it is running at light throttle at around 1250 rpm. The tires do best around 40-42 psi, but sometimes the tire vibrations line up just right and the whole truck gets a little buzzy. The engine one generally comes on with slight uphill steady cruising but can be knocked out by engaging tow haul mode and kicking the rpm up a little. I am going to see if the dealer can rebalance the tires at the next oil change and start that ordeal.

 

I have a machine shop and we design, tweak, and build everything from heavy oil field parts to tiny valve assemblies and shooting sports accessories. We build a lot of different things and deal with a lot of different materials. Harmonic resonance is the enemy of getting a good finish and long tool life. A good rule of thumb is that the stronger and harder a material is, the more efficient it is at maintaining and transmitting vibration, just like a tuning fork. The new high strength frames that all of the automakers are using give us bigger payloads, better handling and mileage, and a lot more safety, but they have a downside by being more susceptible to vibration resonance. The old mild steel frames had a much lower natural frequency (plus the softer steel absorbed more vibration converting it to heat) and the new high strength ones seem to have a frequency around 8 to 10 Hz, one that is pretty annoying to people. As long as high strength steel frames are used on body on frame trucks this will be a problem. From looking at the Ram and Ford forums, this does not seem to be just a GM problem. The real solution is adding either a passive or, even better, an active damping system to the truck frames. Could be something as simple as bolting a 20 pound box of lead shot to each side of the frame.

[Silverado 6.2]

I have a 14' Sierra regular bed crew cab 4x4 that seems to have two sources of vibration, the lovely Good Year tires, and the engine when it is running at light throttle at around 1250 rpm. The tires do best around 40-42 psi, but sometimes the tire vibrations line up just right and the whole truck gets a little buzzy. The engine one generally comes on with slight uphill steady cruising but can be knocked out by engaging tow haul mode and kicking the rpm up a little. I am going to see if the dealer can rebalance the tires at the next oil change and start that ordeal.

 

I have a machine shop and we design, tweak, and build everything from heavy oil field parts to tiny valve assemblies and shooting sports accessories. We build a lot of different things and deal with a lot of different materials. Harmonic resonance is the enemy of getting a good finish and long tool life. A good rule of thumb is that the stronger and harder a material is, the more efficient it is at maintaining and transmitting vibration, just like a tuning fork. The new high strength frames that all of the automakers are using give us bigger payloads, better handling and mileage, and a lot more safety, but they have a downside by being more susceptible to vibration resonance. The old mild steel frames had a much lower natural frequency (plus the softer steel absorbed more vibration converting it to heat) and the new high strength ones seem to have a frequency around 8 to 10 Hz, one that is pretty annoying to people. As long as high strength steel frames are used on body on frame trucks this will be a problem. From looking at the Ram and Ford forums, this does not seem to be just a GM problem. The real solution is adding either a passive or, even better, an active damping system to the truck frames. Could be something as simple as bolting a 20 pound box of lead shot to each side of the frame.

Ram uses a damper that hangs off each side of the frame under the front doors, I feel you are correct on this as long as you are the person that has that kind of vibration. and not the shakes.

[silverado990]

http://sandyblogs.com/techlink/?p=2147

 

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