Shake or Vibration Issues

[wagattack]

My new 2014 Denali with 1000 miles on it does the exact same thing. This morning going to work, I look over at the passenger seat and my iPad almost fell off the seat until I grabbed it. What the hell is going on?

Edited August 1, 2014 by wagattack

[Fishingbear]

A representative I spoke with at the GM Business Resource Center, the department you are referred to after you call and complain to GM, admitted that they know they have a problem but that their engineers can't figure out how to fix it. At this point I think it's only a matter of time before the vibration causes the truck to fail resulting in a fatal accident. Hopefully I'm not behind the wheel when this happens.

Edited August 1, 2014 by Fishingbear

[Silverado-Hareek]

A lady I spoke with at the GM Business Resource Center, the department you are referred to after you call and complain to GM, admitted that they know they have a problem but that their engineers can't figure out how to fix it. At this point I think it's only a matter of time before the vibration causes the truck to fail resulting in a fatal accident. Hopefully I'm not behind the wheel when this happens.

 

You're telling us GM confirmed to you that the truck will eventually fail from the vibration and cause an accident?

 

EDIT: Never mind I misread your post. You stated that was your opinion. Sorry for the confusion.

Edited August 1, 2014 by Silverado-Hareek

[Fishingbear]

 

You're telling us GM confirmed to you that the truck will eventually fail from the vibration and cause an accident?

 

EDIT: Never mind I misread your post. You stated that was your opinion. Sorry for the confusion.

 

Sorry if there was any confusion. Yes it is my option and I really hope this doesn't happen but I don't know what else it's going to take for GM to fix the vibration problem.

Edited August 1, 2014 by Fishingbear

[Pinnacle]

Can any of you guys here get your hands on a set of wheels (rims included) that are of the previous GMT900 trucks and that are balanced. Put them on and go for a ride.

[Guest]

Can any of you guys here get your hands on a set of wheels (rims included) that are of the previous GMT900 trucks and that are balanced. Put them on and go for a ride.

Did that. Plus a set of 24s that rode great. Vibration still exists.

[Pinnacle]

Did that. Plus a set of 24s that rode great. Vibration still exists.

You put a set of the older wheels on and it still had the vibration!?

[brandonbvr]

This is a thought and not necessarily a proper fix. Does anyone who has a shake at 70-80 mph have any weight in their bed? These trucks are lighter than before and the frames flex more so I am told. I'm going to try 200-300 lbs of sand bags and see how it goes.

This is a thought and not necessarily a proper fix. Does anyone who has a shake at 70-80 mph have any weight in their bed? These trucks are lighter than before and the frames flex more so I am told. I'm going to try 200-300 lbs of sand bags and see how it goes.

[brandonbvr]

Trucks in previous years have had this issue of shaking on the highway as a a result of frame beaming. If you put 400-600 pounds of weight between the tailgate and the wheel tubs and the shaking on the highway goes away then you have frame beaming. If this is the case, then it is just a matter of time before GM redesigns the rear cab mounts.

[brandonbvr]

I hope this is the answer to everyones highway shakes

[Fishingbear]

Trucks in previous years have had this issue of shaking on the highway as a a result of frame beaming. If you put 400-600 pounds of weight between the tailgate and the wheel tubs and the shaking on the highway goes away then you have frame beaming. If this is the case, then it is just a matter of time before GM redesigns the rear cab mounts.

Someone in this forum did the sand test about 4-6 weeks ago and it did not reduce the vibration. Give it a shot, who knows. Good luck!

[Guest]

You put a set of the older wheels on and it still had the vibration!?

Yes

[brandonbvr]

300 lbs sand did not stop shaking at highway speeds. Guess we will have to wait for the new body mounts.

[14SLTZ71]

When I first got my Silverado it was winter and when I got out of work it would shake and bounce for the first few miles so I had the tires changed to michelins and now it barely does it and only last about a 1/4 mile.

The other day when I took off after stopping at a red light the rear end of the truck felt like it was walking for a second then it quit. Very weird feeling.

I do have a vibration in my floorboard and accelerator pedal however, I'm thankful that I don't have the shakes that some of you guys have.

Edited August 2, 2014 by 14LTZZ71

[Bobsfirstchevy]

With the vibration problems the majority of us are having at speeds 45-55 and 70 and above it has to something common to all models even with different options. Something I mention to my service manager was the power steering control module which has software and referred to as Smooth Road Shake Compensation. Its made up with different sensors feeding back to a module to computer, with bad information from sensors to module to computer could cause it to over react and cause maybe the problem were having.( maybe too sensitive )My service manager knew what I was talking about, but he has nothing from GM. So if we have anyone from GM reading this forum or any of our members know of anyone with connections to GM maybe they could have this checked out.( They might have to rewrite new software for our trucks)