Shake or Vibration Issues

[DanMan_S]

Canada does have what is called CAMVAP which is like an arbitration process. Bought my 2014 Sierra 4x4 CC Z71 back in August and the dealer has had it for a combined 11 weeks . New rear end, tires and various other parts and RF balance and it still vibrates. Dealer has been very cooperative and is aware if not fixed next try CAMVAP will become involved.

 

I've had family members that have used the CAMVAP process and it was painful to say that least. Once it was all said and done, they felt it would have been easier just to trade the vehicle in at a different dealership and save themselves the time and stress.

[20L8TSierra24]

Take it to another dealer. It is obvious that this dealership is using these excuses not to work on your truck because they have no idea how to fix the problem.

They don't get paid to find a problem, they just get paid to fix it once found I believe.

[Adster]

Sadly, I have to add my truck to the long list of ones with vibration issues. Bought in Sept 2014, 2014 Sierra CC SLT Z71 4x4, has 2200km on it. It's had a bit of a vibration from 65-75kph, strongest at 70kph since new only in the steering wheel, definitely couldn't feel it in the peddles or body or anywhere else. So it wasn't too annoying and I honestly think it's the wheels/tires, so finally last week took it in and described the issue and me and service agent agreed it seemed like a balance issue.

 

Dropped off 8am, said they had a busy day, by mid afternoon said they need to keep it over night because they ordered 2 new tires because both on the right side would not balance in spec. So they keep it until the next day, get a call in the afternoon that the new tires are installed and balanced but... still a slight vibration from 70-75kph. He said they can keep it and keep checking the driveline for a bad ujoint, driveshaft etc. or I can come take it for now and see how it is. If I don't like it they can proceed with more work next week.

 

So I pick it up and sure enough it's like the vibration has been narrowed down to more like 70-77kph. I wouldn't necessarily call it less of a vibration, just different, like a bit higher frequency, and actually slightly more annoying than the previous initial vibration that was over a wider speed but slower frequency, and I swear there's a hint of it in the gas peddle now where as there was none before.

 

Anyhow, that's a bummer, and I swear after reading on here I'm still maybe gonna push going another round on the tires and wheels. Because they definitely changed the vibration with 2 days of adjusting and 2 new tires. I'm weary of going down the long road of tearing apart the driveline on my brand new truck.

 

But check out the work order and tell me if it looks like the second of the 2 new tires they got was also a dud with an initial road force balance of 32 lbs and then machine said couldn't balance... then what? the guy said F it and threw it on anyways?

 

Here's the w/o:

 

[tbarn]

Looks like you need more tires. Spec for 14/15 Silverado/Sierra is 14 or 15. I'll have to look at the tsb again.

[Adster]

Looks like you need more tires. Spec for 14/15 Silverado/Sierra is 14 or 15. I'll have to look at the tsb again.

 

Thanks. Would you be able to send me or post the tsb so I can take a look at it?

[tbarn]

PI1345B (partial)

1. Document the before and after Road Force Variation (RFV) numbers on the vibration worksheet located at the end of this bulletin.

Road Force Specifications

P-Metric tires on passenger cars

15 lbs (6.8 kg) or less

P-Metric tires on light trucks

15 lbs (6.8 kg) or less

LT - tires on light trucks

15 lbs (6.8 kg) or less

Note: These numbers are lower than what is currently published in service information as some vehicles react to parts that are near the high limit. These numbers SHOULD NOT be used if you do not have a tire speed related disturbance.

Repair:

• For any assembly that has an out of balance condition (greater than 0.25 oz), remove the weights and correct the condition utilizing normal balancing techniques.
• For any assembly having RFV measurements beyond the specification above, vectoring the tire on the rim should be utilized prior to tire replacement. If this does not bring the assembly within specification, the tire should be replaced.

[BobbyC71]

 

1. I'm SO glad it's not just me. Now let me say that I came out of a Honda Ridgeline that I ran flawlessly for 7 yrs. maintenance free. As my friends say I have graduated to a big boy truck. I have recently purchased a 2015 GMC Sierra 1500 with the All Terrain package ( I have 750 miles on it). I have also noticed a slight vibration in the truck. In my opinion it feels like the shift points are off and it is in to high a gear. I have a feeling it has to do with the fuel management system that shuts off some of the cylinders. Once you put your foot into it, it goes away and runs perfect and smooth. I have owned several trucks throughout my lifetime when I had my own construction company. My trucks ranged from Fords and Chevy's to the Honda I just came out of. The reason I say all this is because I'm not a suit and tie suburban dad that just bought the truck to look cool. I bought it because I needed a bigger vehicle. I'm taking mine in tomorrow and I hope there is something they can do to fix the problem.

 

[Wrench589]

 

• I'm SO glad it's not just me. Now let me say that I came out of a Honda Ridgeline that I ran flawlessly for 7 yrs. maintenance free. As my friends say I have graduated to a big boy truck. I have recently purchased a 2015 GMC Sierra 1500 with the All Terrain package ( I have 750 miles on it). I have also noticed a slight vibration in the truck. In my opinion it feels like the shift points are off and it is in to high a gear. I have a feeling it has to do with the fuel management system that shuts off some of the cylinders. Once you put your foot into it, it goes away and runs perfect and smooth. I have owned several trucks throughout my lifetime when I had my own construction company. My trucks ranged from Fords and Chevy's to the Honda I just came out of. The reason I say all this is because I'm not a suit and tie suburban dad that just bought the truck to look cool. I bought it because I needed a bigger vehicle. I'm taking mine in tomorrow and I hope there is something they can do to fix the problem.

For those experiencing vibration, I trust the vibration is in both V4 and V8 mode, because it would be a waste of time to try to fix vibration that is only in v4 mode. V4 mode will definitely generate some vibration and the bottom line it - we are stuck with it. A V4 engine is inherently rough running. Counterbalancing can correct it, but then it would be horrible in V8 mode. So, GM has to balance it for one or the other, but not both. Since V8 mode is more important, that's where it gets balanced. Bottom line - if V4 mode vibrations are too bothersome, then a GM is not for you. Get a Ford Ecoboost. Not trying to be a smart ass, but that's an unfortunate characteristic of these Active Fuel Management engines. Alternately, get a programmer from the aftermarket and turn the AFM off.

[Wrench589]

Tbarn, any change you could be so kind to post a like to where I can download the full TSB PI1345B? Would like to have a copy to put with the rest I've been collecting on this issue.

 

Those revised limits are very low. If that is what is truly needed to get rid of the vibration, then we are in for a ongoing pain in the butt. As the tires wear, the RFV will change and if these vehicles are so sensitive that they need perfect balance and RFV, well that will not be good. Maybe on a Ferrari, not not a pickup.

 

Btw, I just helped a buddy swap out the wheels and tires on his BMW. Hunter RFV values after balancing were 7, 24, 23, and 27 lb for the four. Car is smooth as glass all the way up to.... Well, I better not say. Let's just say the speed limiter on the Chevy will have kicked in. So, if that car doesn't need perfectly balanced/RFV wheels and tires, why do these trucks?

 

Troubling, to say the least.

[Adster]

For those experiencing vibration, I trust the vibration is in both V4 and V8 mode, because it would be a waste of time to try to fix vibration that is only in v4 mode. V4 mode will definitely generate some vibration and the bottom line it - we are stuck with it. A V4 engine is inherently rough running. Counterbalancing can correct it, but then it would be horrible in V8 mode. So, GM has to balance it for one or the other, but not both. Since V8 mode is more important, that's where it gets balanced. Bottom line - if V4 mode vibrations are too bothersome, then a GM is not for you. Get a Ford Ecoboost. Not trying to be a smart ass, but that's an unfortunate characteristic of these Active Fuel Management engines. Alternately, get a programmer from the aftermarket and turn the AFM off.

 

Nope, no difference between V4 or V8 mode for my vibe. It is different depending on how hard I accelerate or decelerate through it.

 

I had a 2007 Avy, so I've already had my fun with first gen AFM issues like mysteriously burning a quart of oil on a 2hr trip randomly once or twice a year.

Edited March 9, 2015 by Adster

[Adster]

 

PI1345B (partial)

1. Document the before and after Road Force Variation (RFV) numbers on the vibration worksheet located at the end of this bulletin.

Road Force Specifications

P-Metric tires on passenger cars

15 lbs (6.8 kg) or less

P-Metric tires on light trucks

15 lbs (6.8 kg) or less

LT - tires on light trucks

15 lbs (6.8 kg) or less

Note: These numbers are lower than what is currently published in service information as some vehicles react to parts that are near the high limit. These numbers SHOULD NOT be used if you do not have a tire speed related disturbance.

Repair:

• For any assembly that has an out of balance condition (greater than 0.25 oz), remove the weights and correct the condition utilizing normal balancing techniques.
• For any assembly having RFV measurements beyond the specification above, vectoring the tire on the rim should be utilized prior to tire replacement. If this does not bring the assembly within specification, the tire should be replaced.

 

 

Thanks, that will probably help. I think on mine I gotta find out what went on with that replacement tire that wouldn't balance and they possibly threw it on the truck anyways to see if it was good enough. Hope not, that would be a bad way to start things off.

Edited March 9, 2015 by Adster

[crheming]

I have had my truck in the shop for over a month. Road forced the stock goodyears twice (didn't help), got new goodyear all terrain adventures w/ kevlar (my favorite tire, have had on multiple trucks - didn't help), replaced one of the new tires that was slightly out of spec (didn't help), road forced again (didn't help), GM engineering sent my dealership this fancy vibration analysis device.

 

They took apart my front diff and replaced the ring gear (4x4 vibration that I honestly didn't even notice but the shop foreman did) and put new Michelin LTX MS2 on it (for the high speed vibration), road forced, and voila, it's fixed!!

 

They had the Goodyear rep at the dealer over this as well, and he said that TONS of sierras are having problems with Goodyears (especially the Z-71s with 20s on them).

Edited March 9, 2015 by crheming

[tlevine99]

My truck came from factory lifted and giving me the run around will never buy another truck from Chevy Somerset Kenny Ross in Somerset Pa. Once they got your money its funny how they act . Service manager trying to say it's normal to shake ! So my steerung wheel shaking was a design by Chevy? I can't toe anything because it's like driving in a helicopter ! Less then 10000 miles has frame rust

[tlevine99]

4 appointments service manager forgot what he told me, second one he set up and wasn't even there. 3 hour round trip for nothing thanks Ray Service manager at Somerset Kenny Ross

 

They say not suppose to use auto . Keep in 2 wd then why did you make auto ?

Still shakes In 2 wd

[tlevine99]

4 appointments service manager forgot what he told me, second one he set up and wasn't even there. 3 hour round trip for nothing thanks Ray Service manager at Somerset Kenny Ross

 

They say not suppose to use auto . Keep in 2 wd then why did you make auto ?

Still shakes In 2 wd

can't use auto?

This is like a bad joke they just don't want to pay back the money I paid out sad day for Chevy