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2017 Duramax 837 miles and broken down at the dealer

Nick438w

By Nick438w
in Troubleshooting & Recalls

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newdude Senior Enthusiast

newdude

Posted
Posted

Rather unfortunate...someone will end up with a nice repaired Denali...sounds like it might not be you...Nothing is perfect in life...some folks spend $200k on a house, finding out that it needs $70k in work because someone did a bad job...stuff that isn't under warranty...

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Nick438w Enthusiast

Nick438w

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Rather unfortunate...someone will end up with a nice repaired Denali...sounds like it might not be you...Nothing is perfect in life...some folks spend $200k on a house, finding out that it needs $70k in work because someone did a bad job...stuff that isn't under warranty...

Could absolutely be worse, I totally get that.

 

I spoke to a regional level manager last night and they are visiting the dealership this afternoon with someone from GM Diesel engineering, they assure me that we will have a repair plan or replacement plan in place no later than close of business Thursday this week. I will update this thread after I get some more information.

GottaHaveFaith Enthusiast

GottaHaveFaith

Posted
Posted

After speaking to the dealer today, they are back pedaling with the diagnosis. They are now telling me that they cannot confirm the turbo failed and are still awaiting help from GM for further technical assistance. They can provide no indication on when to expect a repair plan. I've spent several hours on the phone and have finally got a hold from someone in the corporate office, I've formally requested that they replace this vehicle. At this point I'm not willing to accept repairs to a truck that is less than 2 weeks old and has cost 70k$. The truck can not reach even a highway speed and would be unsafe to drive, this should qualify for a lemon after 5 more days elapse with my vehicle in the shop. Really Really disappointed experience wise with my first GMC truck.

Pretty easy to figure out.

Take the turbo off and look at it.

Crap in this much time they should have diagnosed the problem and could have rebuilt the entire engine if needed.

If a mechanic cannot diagnose it in 1 day then fire him.

Nick438w Enthusiast

Nick438w

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Day 7 at the dealer and no firm diagnosis, this surely is getting old... I'm expecting a call back within the hour from regional level management to discuss where we are at with this mess. I will update as soon as I have some more news

Nick438w Enthusiast

Nick438w

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Spoke to senior gm advisor today, they cannot confirm any diagnosis after having my new truck for 7 days. They are now asking for another 4 days to work on a diagnosis. At this point I've requested a replacement vehicle and am awaiting a decision from GM. This is becoming very trying with my patience but I'm trying to keep a level head.

SouthpawHD Enthusiast

SouthpawHD

Posted
Posted

OP, I'm sure this is hugely frustrating but asking for a replacement vehicle so early on I think is just jumping the gun. Relax, be patient, and let the dealership and GM do what they need to do. After all, you are literally one of the first people in the country to own of these new motors. Good luck.

Nick438w Enthusiast

Nick438w

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Captain's log: Day 8

Dealer called this afternoon. They still have not been able to confirm the problem, I suggested shining a flashlight in the turbo but they did not appreciate my attempt a humor. They tell me that a field quality engineer is being dispatched from their Detroit office on Monday and should be able to lend further insight.

The wait continues...

Shagmax Enthusiast

Shagmax

Posted
Posted

Low today was 26, in all the years I've only had problems with my one diesel tractor around -4 with gelled fuel. Fwiw, the truck was on its second tank of fuel and it was bought from the same station I just filled our international truck from and that truck is running just fine.

I'm unimpressed with the Ford, it's much louder than the gmc and feels a bit like a tin can honestly. The Ford is an xlt model so I don't know if it's fair to compare to the Denali. Coming from a Ford lariat diesel I wouldn't consider this particular xlt model that I have as a loaner

 

Well, the Ford is made out of aluminum now.... Thus the tin can, lol

redwngr Senior Enthusiast

redwngr

Posted
Posted

Captain's log: Day 8

Dealer called this afternoon. They still have not been able to confirm the problem, I suggested shining a flashlight in the turbo but they did not appreciate my attempt a humor. They tell me that a field quality engineer is being dispatched from their Detroit office on Monday and should be able to lend further insight.

The wait continues...

I'm a little surprised they haven't dropped a new one in your truck so they could take yours and diagnose it at their leisure.

Cowpie Senior Enthusiast

Cowpie

Posted
Posted

As for a turbo "coming apart", I find that highly questionable. After several decades of dealing with turbo charged diesels, there is usually no doubt when a turbo goes south. Now, the actuator on the turbo that adjusts the vanes could have failed, that happens more than it should. But with all the sensors they have on diesels nowadays, all it takes is a couple of the not playing nice with each other to throw things out of wack. Being it runs and you can't get it up to speed sounds more of sensors putting it in limp mode due to something related to the emissions systems. But then, with the complexity of these darn things nowadays, all of our speculation could be wrong.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

As for a turbo "coming apart", I find that highly questionable. After several decades of dealing with turbo charged diesels, there is usually no doubt when a turbo goes south. Now, the actuator on the turbo that adjusts the vanes could have failed, that happens more than it should. But with all the sensors they have on diesels nowadays, all it takes is a couple of the not playing nice with each other to throw things out of wack. Being it runs and you can't get it up to speed sounds more of sensors putting it in limp mode due to something related to the emissions systems. But then, with the complexity of these darn things nowadays, all of our speculation could be wrong.

Could be a transmission issue causing limp too, completely unrelated to the engine...just because of a loss of power, doesn't immediately indicate an engine problem. I had a 99 Dodge Cummins do that whenever it sensed the transmission governer pressure too high...

 

The fact they have not been able to diagnose the issue indicates it's not a electrical/sensor issue to me and deeper than a sensor issue...I had/have a 09 Forester lose a rod bearing...it lost power to the point it wouldn't maintain 35mph and never popped a CEL.

 

I would also guess they have the ability to read an error code? Truck so new they haven't released software to read the onboard computer?

 

Sent from my SAMSUNG-SM-G900A using Tapatalk

Colossus Senior Enthusiast

Colossus

Posted
Posted

No matter how great of quality control standards are out there, no matter how many test vehicles they run and for how long they run em prior to the release of new technology/models/redesigns, there will always be failures such as this, to where the best service technicians at these dealers won't have any idea what is going wrong and why, and have to defer back to HQ for help. And then those fancy highly paid HQ technicians and engineers may not have any idea either, and thus they have to start sending out people from HQ to see just what is going on here. However- while this is happening I do believe they should try to accommodate you as best as possible. I do think that you need to give them a chance to see what the problem is, not the dealership people but the HQ people. As long as they have you in a loaner that is an HD and diesel and can get you by for a few weeks, I see no trouble there. Sure it's a shitty feeling to have spent $20,000 or $80,000, or $100,000 for that matter on a mechanical device that like any other mechanical device out there is subject to failure at anytime, but hey.. sometimes we get dealt a bad hand of cards in life and just have to play thru it. Hang in there. Things will get better. May not happen as fast as you want, but it will happen. Just remember, there are no guarantees in life, there is just life.

Nick438w Enthusiast

Nick438w

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Day 11:

After the dealer received a visit from a "Field Quality Engineer" today, they have been given permission to remove the turbo for inspection. The dealer explained that they can only do what the engineering team dictates and we are stuck working at their pace. I would expect to have some type of determination by tomorrow as to if the turbo failed. I continue to be patient with this issue, I'm hoping to have my truck back soon with enough time to ensure whatever repairs they make are solid before taking a trailer down the east coast in the beginning of February for our season opening race at SGMP.

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