Shake or Vibration Issues

[GMCJOE17]

1 hour ago, Barak said:

Yep saw this video and my doesn’t do the same when having a bottle of water in front center console. Again it would be cool to get in a truck that also vibrates to really compare and determine ifan issue exists. 

Barak is yours a 6 speed or 8 speed transmission?

[Barak]

Great news. Well keep us posted so we have something to share with the dealership to troubleshoot for besides tires rebalancing and downgrading tire pressure. 

[Barak]

6 speed...

[GMCJOE17]

21 minutes ago, Barak said:

6 speed...

OK, I wasn't sure and if you had the 8 speed that was a different problem than this one. 

[Barak]

Right. Based on all reads and everything I learned about so far, I am still studying it. Reason is while I know this vibration affects 1500s, I am not sure if what I feel is aort of normal for 3/4 ton heavy duty truck and diesel. So I am just curious now about it all and need to explore further. 

[don67]

It's important that your dealership is equipped with a road force tire balancer.     

 

My Silverado's rear tires were found to have over 20 lb each of road force, resulting in two new tires under warranty and no more shaking.  

[Barak]

Thanks Don67. What brand tires do you have? The dealership has told me that every time they balance any truck tires, they do it on road force balancer and within manufacturers specs in my case GMCs. However, my dilemma is that when I go there it’s usually some young tech who I feel doesn’t even listen to what my frustration is. They also hesitate to drive the truck on thruway at speeps such as 73-75mph. So far I drove the truck on thruway at many speeds including at 80, 90 and 95. I am shocked to say that only shake/vibration that I am curious about still occurs at speeds 73-75. It’s very interesting! So at this point I feel taking it to independent tire shop and explaining to them the shake/vibration at that speed to see if they will be able to road force, rotate as well and see what they say about the GMCs specs requirements. I just don’t know if the dealership would continue cooperating if I end up going to independent tire place. Thoughts? 

[Brianibew]

3 hours ago, Barak said:

Thanks Don67. What brand tires do you have? The dealership has told me that every time they balance any truck tires, they do it on road force balancer and within manufacturers specs in my case GMCs. However, my dilemma is that when I go there it’s usually some young tech who I feel doesn’t even listen to what my frustration is. They also hesitate to drive the truck on thruway at speeps such as 73-75mph. So far I drove the truck on thruway at many speeds including at 80, 90 and 95. I am shocked to say that only shake/vibration that I am curious about still occurs at speeds 73-75. It’s very interesting! So at this point I feel taking it to independent tire shop and explaining to them the shake/vibration at that speed to see if they will be able to road force, rotate as well and see what they say about the GMCs specs requirements. I just don’t know if the dealership would continue cooperating if I end up going to independent tire place. Thoughts? 

The dealer is not going to know if an independent shop RFB’d your tires or not.  If you take it elsewhere and it doesn’t work out, take it back to the dealer and have them throw some more parts at it.

[Barak]

I am going to consider going to independent shop just to rulle rims/tires out and maybe I will learn something new about these Goodyear wranglers from them! After that I will continue with the dealership if vibration persists as I have learned some had ring and pinion replaced per GM. 

[GMCJOE17]

Got a text from the service manager today. Said they replaced the ring and pinion and there is still a vibration. He said they sent more data to GM to see what the next step is.

 

Its sad that dealers can no longer troubleshoot problems themselves and that they have to get approval from GM for warranty work. I guess GM's process is done via a flowchart. My worry is where this will wind up at the end of the chart.

 

This is why I always say that people who drive desks for a living will never understand real world problems or how to repair them.

 

Lets see what the Professors at GM come back with. Hopefully its a new driveshaft to go along with my new ring and pinion, and new set of tires.

[Barak]

That’s very interesting discovery. Well here is how far I got. So far 2x to dealership first time was road forced balancing second was let some air pressure out of rear tires. At that point I was at 800 miles or so. Now I am at 1300 miles and come to find out shake/vibration is reduced significantly for whatever reason. However in mean time I did reach out to GM corporate and they have now an open case only because I wanted the dealership troubleshoot for 2 service bulletins relative to bent wheel, bad tires and driveshaft turnes. So will be back in for 3rd visit to see what they will come up. I have speculated whether or not it could be something with bent rotor or not properly functioning caliper(s). I have felt brakes to squal as well so now I am just curious. And shake/vibration reduction may have been to rotors wearing off or caliper dead or who knows anymore. More to come. 

[don67]

On 10/11/2018 at 8:57 AM, Barak said:

Thanks Don67. What brand tires do you have? The dealership has told me that every time they balance any truck tires, they do it on road force balancer and within manufacturers specs in my case GMCs. However, my dilemma is that when I go there it’s usually some young tech who I feel doesn’t even listen to what my frustration is. They also hesitate to drive the truck on thruway at speeps such as 73-75mph. So far I drove the truck on thruway at many speeds including at 80, 90 and 95. I am shocked to say that only shake/vibration that I am curious about still occurs at speeds 73-75. It’s very interesting! So at this point I feel taking it to independent tire shop and explaining to them the shake/vibration at that speed to see if they will be able to road force, rotate as well and see what they say about the GMCs specs requirements. I just don’t know if the dealership would continue cooperating if I end up going to independent tire place. Thoughts? 

Sorry for the late response.   I have the OEM Wranglers... brand-new truck just this summer.

 

Definitely try your luck at a private tire shop.  A good one will be happy to diagnose what the dealer missed, and give it to you in writing. 

 

I was lucky that my dealer recognized the shaking, as it wasn't very severe.   Although I said it was gone in my previous post, I still get traces of it at highway speeds but not all the time.   Not sure this truck will ever feel glassy-smooth.

[Barak]

Ok thanks. So you are getting it here and there. That’s what I am starting to experience now too. No more shake/vibration at 72-75 speeds but felt it little at 77, 81 and 85. Very strange but interesting. I haven’t gone to independent tire shop yet as they instructed me to continue exploring with dealership first due to cost they would need to charge me for road force balancing which would be about $100 for 4 tires. I will be at dealership tomorrow for another look per 2 service bulletins to rule some stuff out. Will provide update. Thanks! 

[Barak]

Update: went to dealership per GM to troubleshoot for service bulletins I found which may be related to my vibration concerns. Dealership took vehicle in but told me because it would go thru a PICO test, they weren’t sure if one was available in their shop. I left and 7 hours later advisor contacts me telling me they don’t have PICO tool and one was on order so they will have to call me to bring truck back. I said ok sure. Went to pick it up and truck was parked on lot same exact way I left it meaning they didn’t touch it. Anyway, so next step is PICO test. However, this time I was approached by service manager who informed me that they had a customer with similar concerns and they ended up replacing shafts, drive axles,  etc. So this time I learned that dealership is aware of the vibration concerns and so is GM and it’s now occurring on 2500HDs not just 1500s sierras or Silverados. There you go guys that’s what I learned about this time and what’s next step for me. Thanks! 

[GMCJOE17]

19 minutes ago, Barak said:

Update: went to dealership per GM to troubleshoot for service bulletins I found which may be related to my vibration concerns. Dealership took vehicle in but told me because it would go thru a PICO test, they weren’t sure if one was available in their shop. I left and 7 hours later advisor contacts me telling me they don’t have PICO tool and one was on order so they will have to call me to bring truck back. I said ok sure. Went to pick it up and truck was parked on lot same exact way I left it meaning they didn’t touch it. Anyway, so next step is PICO test. However, this time I was approached by service manager who informed me that they had a customer with similar concerns and they ended up replacing shafts, drive axles,  etc. So this time I learned that dealership is aware of the vibration concerns and so is GM and it’s now occurring on 2500HDs not just 1500s sierras or Silverados. There you go guys that’s what I learned about this time and what’s next step for me. Thanks! 

So they went from "they don't have a Pico available" to "they don't have one at all"? Makes you wonder when they get one if they even know how to use it. Guessing they got lucky replacing the items on the "other" truck. As far as I know 2500's have always been in the Vibration zone along with 1500's. Good luck!