Jump to content

Shudder/Vibration Issue

bigman32hockey
 Share

Recommended Posts

bigman32hockey Enthusiast

bigman32hockey

Posted
  • Author
Posted

Thanks guys.  I totally understand how the forums work.  You rarely hear from the people who are totally satisfied with their trucks.  However, after reading all about the issue, it seems hard to believe that GM doesn't know they have a problem on their hands.  Here is an update as to where I currently stand...

 

I spoke with my Senior Advisor today.  Apparently a "new" bulletin has just been released by GM regarding the TCC shudder.  GM is releasing special tooling for dealerships in order to fully flush the transmission fluid from the truck.  I guess blowing out the lines with 60lbs of pressure wasn't doing the trick.  So at least they are making headway on it.  However, I was also told the tooling will not ship to my dealer until February 14th at the earliest.  Being as my truck shudders constantly between 40 and 50 mph (where I drive 90% of the time), I told the Advisor I felt GM should supply me with a loaner vehicle until the tooling arrives and my truck is fixed.  She then called my dealer who, of course, told her they wouldn't do that.  She called me back and said she was going to get in touch with the GM Regional Manager.  I am currently waiting on a call-back from her regarding his/her decision.  I can tell you one thing though.  If GM decides not to put me in a rental, they can kiss this customer goodbye.  In the past 10 years I have purchased 8 brand new Chevrolet's from this dealership.  I have been a very loyal customer to the brand.  If I am not shown some loyalty back, I will be taking my hard-earned money to a competitor and won't look back.  

  • Replies 163
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

2017Darkness
2017Darkness

You KNOW this won't fix the shudder issue?? I write service for and Chevy dealer and can assure you the flush takes care of 98% of the vibration issue. I had my 17 6.2 flushed in early December and ha

bigman32hockey
bigman32hockey

My brand new '18 Redline Editon developed "the shudder" at around 450 miles.  Mine seems to shudder worst when around 50 mph and constant speed and again between 65-70 mph, where it will do it all the

SauceyMcB
SauceyMcB

There was another post on this. Apparently the guy took his truck in and had the driveshaft looked at. The specs were a bit off and it wasn’t true all the way around. I think he said it cost him like

Posted Images

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
I have to agree with this.... You usually only hear about the bad ones...although there are a lot of people that may or may not have issues that don't know about this forum either.. But this does sound like a pretty big problem for GM since its not only our trucks..Camaro and Corvettes have the same problems..
 
I have my 2018 truck about a year now and 8500 miles and I don't have any issues with mine... My only real complaint is when doing a rolling stop and getting back on the gas it will act like its in neutral ( rpm goes up while coasting ) then slam into 1st... if I actually stop, there are no issues... I tried different speeds on the highway and no shuttering at all...so far
 
Just throwing it out there my 2018 was built in 11/2017 , not sure if time of build has anything to do with it
 
I know the 2015-2016 trucks had a lot more issues than the 2017-2018 models do., but I wonder how many 2018 models have this issue?? Most of the posts on here are 2015-2016 trucks, there are not too many specifically on the 2018s yet.
Sounds just like your torque converter is on its way out.

Sent from my LG-G710 using Tapatalk

ajensen383 Enthusiast

ajensen383

Posted
Posted
27 minutes ago, Snowcamo said:

Sounds just like your torque converter is on its way out.

Sent from my LG-G710 using Tapatalk
 

Im not  sure,  it was like that since new... Hasn't gotten any worse

Snowcamo Senior Enthusiast

Snowcamo

Posted
Posted
Im not  sure,  it was like that since new... Hasn't gotten any worse
Man that just ain't right bud. Something is a bit off. Only auto trans I know that "flashes" like that was the 700r4.

Sent from my LG-G710 using Tapatalk

Bigmac Enthusiast

Bigmac

Posted
Posted (edited)
4 hours ago, bigman32hockey said:

Thanks guys.  I totally understand how the forums work.  You rarely hear from the people who are totally satisfied with their trucks.  However, after reading all about the issue, it seems hard to believe that GM doesn't know they have a problem on their hands.  Here is an update as to where I currently stand...

 

I spoke with my Senior Advisor today.  Apparently a "new" bulletin has just been released by GM regarding the TCC shudder.  GM is releasing special tooling for dealerships in order to fully flush the transmission fluid from the truck.  I guess blowing out the lines with 60lbs of pressure wasn't doing the trick.  So at least they are making headway on it.  However, I was also told the tooling will not ship to my dealer until February 14th at the earliest.  Being as my truck shudders constantly between 40 and 50 mph (where I drive 90% of the time), I told the Advisor I felt GM should supply me with a loaner vehicle until the tooling arrives and my truck is fixed.  She then called my dealer who, of course, told her they wouldn't do that.  She called me back and said she was going to get in touch with the GM Regional Manager.  I am currently waiting on a call-back from her regarding his/her decision.  I can tell you one thing though.  If GM decides not to put me in a rental, they can kiss this customer goodbye.  In the past 10 years I have purchased 8 brand new Chevrolet's from this dealership.  I have been a very loyal customer to the brand.  If I am not shown some loyalty back, I will be taking my hard-earned money to a competitor and won't look back.  

Maybe I can lend some info here on this issue. I’m an ex tech and for 25 years a factory field service rep ( not Gmc) so have been around the block. I had a 2017 6.2 8 speed and we replaced 2 converters and 3 flushes. Not to bad driving but pulling an rv was a dog ?   peach seeds it shook so bad. It did settle down after 10 k miles but always there. Family member bought it so I purchased a 2018 identical truck Max tow 6.2 8 speed end of production vin thinking this was it and all the problems cured. Wrong. Same thing.  IMO it is a tq modulation and the fluid breaks down.  Instead of me getting upset I just lowered my expectations of a Gmc truck.  Waiting for fluid fix and I don’t think you’ll get a rental as it is still drivable unpleasant as it is. You might be lucky especially if a good customer. I’m as anal as anyone on this problem ( ton of posts) but sitting back waiting to see if it really is repairable  I understand the 2019 8 speeds do not have this condition but I believe a different converter is used. End of my rant ??

Edited by Bigmac
teamkeystone New Member

teamkeystone

Posted
Posted

hey bigmanhockey32

 

i have experienced the odd lurch forward after remote start.  it's happened a handful of times since new.  6.2L sierra crew, mfg date 8/2018.  it was more prevalent when new and hasn't happened in a while.  about 3000 miles on it now.

 

so yeah, after a remote start i get in and as soon as i turn the key, the whole truck lurches forward.  i do set my parking brake every time i stop.  maybe the parking pawl didn't fully engage until the key was turned on again?  not sure if that makes sense.  it has only ever happened after a remote start.

 

anyone else ever experience this?

 

i do not have the shudder issue.  other anomalies include a hesitation when shifting from first to second (only seems to be when cold though).  the shift from first to second is also much firmer than other shifts. 

 

 

ajensen383 Enthusiast

ajensen383

Posted
Posted
14 minutes ago, teamkeystone said:

hey bigmanhockey32

 

i have experienced the odd lurch forward after remote start.  it's happened a handful of times since new.  6.2L sierra crew, mfg date 8/2018.  it was more prevalent when new and hasn't happened in a while.  about 3000 miles on it now.

 

so yeah, after a remote start i get in and as soon as i turn the key, the whole truck lurches forward.  i do set my parking brake every time i stop.  maybe the parking pawl didn't fully engage until the key was turned on again?  not sure if that makes sense.  it has only ever happened after a remote start.

 

anyone else ever experience this?

 

i do not have the shudder issue.  other anomalies include a hesitation when shifting from first to second (only seems to be when cold though).  the shift from first to second is also much firmer than other shifts. 

 

 

I dont have the lurch forward, never did, and I have been using the remote start often now that its cold here in the NE.

 

Whats interesting, is that when my truck is cold, I feel its shifts better than when it gets warm... When i go to work first thing in the morning its been about 10- 20 degrees lately and the shifts are firm and positive and when it gets warm there seems to be more hesitation, like it takes extra timing out during the shift when warm.

bigman32hockey Enthusiast

bigman32hockey

Posted
  • Author
Posted
21 minutes ago, teamkeystone said:

hey bigmanhockey32

 

i have experienced the odd lurch forward after remote start.  it's happened a handful of times since new.  6.2L sierra crew, mfg date 8/2018.  it was more prevalent when new and hasn't happened in a while.  about 3000 miles on it now.

 

so yeah, after a remote start i get in and as soon as i turn the key, the whole truck lurches forward.  i do set my parking brake every time i stop.  maybe the parking pawl didn't fully engage until the key was turned on again?  not sure if that makes sense.  it has only ever happened after a remote start.

 

anyone else ever experience this?

 

i do not have the shudder issue.  other anomalies include a hesitation when shifting from first to second (only seems to be when cold though).  the shift from first to second is also much firmer than other shifts. 

 

 

Thanks teamkeystone.  Glad to here I'm not the only one who has experienced the lurch after remote starting.  I totally agree with you about the shifting.  Mine seems to shift much harder from 1st to 2nd.  After that, it does seem to smooth out somewhat.  I just don't think this is one of the better transmissions available.  Sad to say with it being such an expensive vehicle.  

bigman32hockey Enthusiast

bigman32hockey

Posted
  • Author
Posted

Well, I was informed by my Senior Advisor that the Regional GM Rep. denied my request for a loaner vehicle.  I guess I'm not surprised.  I am, however, disappointed.  Apparently because GM does not deem it a safety issue, they won't do anything.  I am supposed to wait until my dealership gets in the new tooling to do the fluid flush.  That is supposed to be sometime in mid February.  The GM Rep who denied my request should drive over the rumble strips in the middle of the road for the next 3 weeks.  At least then he/she would know what I'm dealing with on a daily basis in my brand new truck.  In the meantime, I'm just supposed to deal with it according to GM.  I've purchased 5 brand new Silverados in the past 7 or so years.  This is the thanks I'm shown?  I told my Advisor I won't be purchasing another GM product when the time comes for a new truck.  Her response?  "Oh, OK.  Is there anything else I can do for you?"  Is there anything ELSE you can do?  You have to actually do SOMETHING before you ask if you can do anything else!  The whole Senior Advisor thing is a joke.  It's just a way for GM to make you think they care.  They don't.  So much for being a Chevy "Truck Legend".  This legend is taking his bank account elsewhere.   

arkenzo Enthusiast

arkenzo

Posted
Posted

I changed my windshield wiper fluid and that fixed the issue, try it might work for you.


Sent from my iPhone using Tapatalk

  • Haha 2
ForumUser Enthusiast

ForumUser

Posted
Posted

New to the forum.

 

Just spoke with dealer re my 2017 High Country (6.2 and 8 speed).  They tell me there is "yet another new fluid being used to replace the fluid in trucks exhibiting ..."  Further, that the fluid is being provided to warm states first as the issue is more common ... that it is related to moisture.

 

Mine is being changed - BUT, there is a line of 10 trucks ahead of me ... :-)

 

Hopefully 2017 Darkness is correct - this will be a great thing!

 

BTW - ajensen383, there are huge numbers of people who suffer in silence or have been told by dealers, "they all do that," and they believed them.  But, I get your point ...

pddug69 Enthusiast

pddug69

Posted
Posted

New to this forum.

In regards to this subject, is the shudder that some are experiencing feel like as if you were driving over rumble strips (wake up strips that are on the side of road)?   That is the shudder that I am having.  Seems more RPM related then mph as it will happen at speeds around 65-75 mph or speeds around 40-50 mph.  When it happens and taking foot off gas pedal (coasting) it goes away and may or may not return.  I though i read somewhere that it could be the throttle position sensor.  Thanks is advance to any responses.

ForumUser Enthusiast

ForumUser

Posted
Posted

Ha - so, after dealer explaining as I outlined a couple of posts, above, another person at the dealership called back a few minutes ago and they said nothing was wrong what it!

 

The story was the shop forman had driven it and it was not shuddering.  I asked how I could have  such a pointed, coherent discussion yesterday with an exact plan, down to the name of the transmission guy, with the service rep, and then today have a completely different story from a different person - almost as if yesterday didn't occur?  Answer - the service rep from yesterday is now on vacation for a week.

 

Follow up from me - did you not drive the truck until today?  How could the story from yesterday exist if you didn't drive it yesterday?

 

I made a recommendation for this new person to talk with the same people the rep yesterday spoke with - and requested a call back.

 

I'm guessing this will end with me picking the truck up, driving it until it starts again, and then taking it back ... probably several times.  On the other hand, perhaps it has magically disappeared?

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      Joke Thread

      By Chuck FB · Posted

      Fred was in the fertilized egg business. He had several hundred young pullets, and ten roosters to fertilize the eggs He kept records, and any rooster not performing went into the soup pot and was replaced. This took a lot of time, so he bought some tiny bells and attached them to his roosters. Each bell had a different tone, so he could tell from a distance, which rooster was performing. Now, he could sit on the porch and fill out an efficiency report by just listening to the bells. Fred's favourite rooster, old Butch, was a very fine specimen, but this morning he noticed old Butch's bell hadn't rung at all! When he went to investigate, he saw the other roosters were busy chasing pullets, bells-a-ringing, but the pullets, hearing the roosters coming, would run for cover. To Fred's amazement, old Butch had his bell in his beak, so it couldn't ring. He'd sneak up on a pullet, do his job and walk on to the next one. Fred was so proud of old Butch, he entered him in the City Show and he became an overnight sensation among the judges. The result was the judges not only awarded old Butch the "No Bell Piece Prize," but they also awarded him the "Pulletsurprise" as well. Clearly old Butch was a politician in the making. Who else but a politician could figure out how to win two of the most coveted awards on our planet by being the best at sneaking up on the unsuspecting populace and screwing them when they weren't paying attention. Vote carefully in the next election, you can't always hear the bells.
    • chfkief
      FS: Black Bear Performance AutoCal Tuning System

      By chfkief · Posted

      Do you still have?
    • 3CarSeatDad
      High Country Suburban build confirmation

      By 3CarSeatDad · Posted

      Can someone confirm if the GM order workbench terminal is able to validate a custom build sequence:   1) Initialize the Allocation Base: Open a new vehicle build queue, select the 2026 Chevrolet Suburban 4WD, and pick the High Country (3LZ Preferred Equipment Group).   2) Select the Diesel Powertrain: Go directly to the engine configuration screen and choose RPO code LZ0 (3.0L Duramax Turbo-Diesel). Ensure it maps to the MHS 10-speed automatic transmission.   3) Deploy the Seating Swap: Navigate to the Interior Options screen and enter RPO code ATT to replace the standard captain's chairs with the power-release 60/40 bench seat. Because you are not trying to force a separate luxury or air-suspension bundle, the standard, premium D07 Fixed Floor Console remains active. The system will accept this change immediately without triggering a warning message.   3)Apply Heavy-Duty Hauling Capability: Input RPO code NHT (Max Trailering Package). The commercial terminal will automatically bundle the required trailering hardware and software modules to support the diesel engine's maximum towing capacity.   5) Layer the Premium Tech and Glass: Separately add code C3U (Panoramic Power Sunroof) and code UKL (Super Cruise) to the order screen.   6) Run the Final Validation: Click the "Validate Order" button at the bottom of the interface.
    • revmanii
      Looking at ordering a '26 WT because I want a std cab, std bed

      By revmanii · Posted

      Spent the last hour or 2 googling and reading up on the spacer thing. I don't like the loss of thread contact on the slip on spacers, but it appears you can get "extended" lug nuts that reach into the hole of the wheel to get back the lost threads. Looks like the only true hubcentric slip on spacers are at least .375". I'd want as little as I could get away with and don't want to cause other clearance issues going any thicker. Bora seems to offer what appears to be a well made .375" spacer and extended lug nuts. I searched here and did find a couple threads recommending Bora. But not cheap. By the time I buy spacers and lugs, new TPMS sensors, then pay a tire shop to install the new sensors, I suspect I'm going to be in over $400. Thinking about running out and getting some washers to put behind the wheel to see if .375" is enough to clear calipers, turn lock to lock without rubbing, and to see if the wheels/tires look strange pushed out a little. This would just be to check fitment.
    • Core-Lokt
      Road Master Active Suspension

      By Core-Lokt · Posted

      Roadmaster makes some quality parts; I have their sway bar. I considered the RAS, but I ended up bagging. I didn't know what kind of ride I'd get with RAS, and the bags have interior jounce bumpers, so I can run 0 pounds pressure. I figured I'd have the best of normal suspension ride with assist on-demand. But it seems you got pretty much the same in one item.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...