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That was going to be my question, if it were tuned or not and if it were tuned then from who. Now we know.

Seeing more of these unfortunate failures when tuned makes me feel better that I went back to stock every time I see them. I had the GDE emissions-compliant tune and felt like it was way too rough on my engine.
 

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That was going to be my question, if it were tuned or not and if it were tuned then from who. Now we know.

Seeing more of these unfortunate failures when tuned makes me feel better that I went back to stock every time I see them. I had the GDE emissions-compliant tune and felt like it was way too rough on my engine.
What do you mean by "too rough"? I've felt (not scientific for sure) that the gde tune makes things easier on the engine and transmission.
 

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What do you mean by "too rough"? I've felt (not scientific for sure) that the gde tune makes things easier on the engine and transmission.
The GDE emissions-compliant tune was causing a lot of engine vibrations at lower RPMs, lugging it at times. Overall just felt very unrefined and hard on the engine and driveline. Going back to stock was much better. If the GDE tune provided the refinement of the stock tune but with a good bump in torque/HP then I probably would've kept running it, but not when it felt like it was hammering my engine.
 

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That was going to be my question, if it were tuned or not and if it were tuned then from who. Now we know.

Seeing more of these unfortunate failures when tuned makes me feel better that I went back to stock every time I see them. I had the GDE emissions-compliant tune and felt like it was way too rough on my engine.
I agree, but the correlation with tuned and damaged has been challenged. They have no hard data, but neither do I. I've been a member for over 4 years and see it, but am willing to go with the data. So, starting now, 1 tuned, 1 damaged. Note the "starting now". Unless you have documentably covered and tabulated every past post, I will ignore historical cherry picking.
 

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I agree, but the correlation with tuned and damaged has been challenged. They have no hard data, but neither do I. I've been a member for over 4 years and see it, but am willing to go with the data. So, starting now, 1 tuned, 1 damaged. Note the "starting now". Unless you have documentably covered and tabulated every past post, I will ignore historical cherry picking.
Indeed, correlation isn't causation, but on the other forums I've seen an uptick in new posts about engine failures while tuned and GDE has been a common link among them. Having run the GDE tune and then gone back to stock because I felt it was only a matter of time before something bad broke, others having the same experience but not caring or thinking it's normal because of the HP/TQ increase and then having an engine failure down the road...was it the tune or just a weak part? Are the tunes exposing parts that are at the edge with the stock tune and pushed over the edge over time with a tune? Again, who knows.

Based on my experience with my truck I won't run a tune. Others may not have the same experience for one reason or another, which is fine, but I just can't help but think I'd be in the failed engine camp if I kept running the tune.
 

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Threads regarding failures....



Too close to determine
 

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I agree, but the correlation with tuned and damaged has been challenged. They have no hard data, but neither do I. I've been a member for over 4 years and see it, but am willing to go with the data. So, starting now, 1 tuned, 1 damaged. Note the "starting now". Unless you have documentably covered and tabulated every past post, I will ignore historical cherry picking.
But that's not really a fair test unless you find a way to include the tunes that haven't failed. As of now, you can demonstrate 100% correlation between tuning and failure.
I wish there were a good way to pull these data together. I have just loved what the GDE tune did to my truck. I typically drive in the Manual mode and don't let it get under 1500 RPM if it's got any load at all. I haven't experienced the vibration that dieseldrax describes so I hope mine's not doing it as opposed to I'm just too clueless to notice it.
 

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But that's not really a fair test unless you find a way to include the tunes that haven't failed. As of now, you can demonstrate 100% correlation between tuning and failure.
I wish there were a good way to pull these data together. I have just loved what the GDE tune did to my truck. I typically drive in the Manual mode and don't let it get under 1500 RPM if it's got any load at all. I haven't experienced the vibration that dieseldrax describes so I hope mine's not doing it as opposed to I'm just too clueless to notice it.
A statistically significant comparison of minor and major problems from owners of both tuned and untuned vehicles, would give us a good idea. Yes, ideally we would need to know the fraction of owners who tuned, but if the problem fractions were lopsided enough, I would be comfortable pointing my finger, with the data as backup.


I agree that my sample size is too small to be of any use. Thanks for your links. and I also agree with you on the lack of statistical significance of the catastrophic failures. I will be collecting data on minor (repeated bad codes, limps, bad running etc.) and major (mechanical failures etc.) problems for both tuned and untuned. I will aks the author each reported problem post that I get from the forum about tuning (if not mentioned) and trust their veracity.

I have a preconception but will do my best to collect the data without cherry picking it.
 

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seems like if we had a good idea of what percentage of trucks are tuned and also what percentage of trucks have serious issues within a certain age range, say 2016-2018, it would be a good start (if we knew for example that 10% of the trucks had issues but that 50% of the tuned trucks had issues, that would be clear indication that tuning is bad for longevity). that's the big missing piece of the puzzle.
i read all these horror stories about catastrophic failures and i feel like i gotta sell my beloved truck. but, i have no idea if those represent 0.1, 1, 10, or 50% of the total vehicles like mine (2017 right in the heart of pin failures, etc.). and then, you add the complication of tuned or not tuned and it's going to be hard to sort out i think.
i guess i'll just keep babying it (which is hard to do when i tow a 4500# trailer a lot of the time) with Rotella t-6 5w-40, stanadyne and never lugging the engine. hate the thought of selling that truck, i've never had a vehicle i enjoy driving as much and it pulls so great, especially after the tune.
 

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The only thing I don’t like about my GDE tune is that it holds in too high a gear at times, causing RPMs to be low (lugs) for the given driving conditions. When I take my regular drive from 5000ft to 9000ft over 16 miles, I put it in tow mode and It greatly reduces that condition.
 

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The only thing I don’t like about my GDE tune is that it holds in too high a gear at times, causing RPMs to be low (lugs) for the given driving conditions. When I take my regular drive from 5000ft to 9000ft over 16 miles, I put it in tow mode and It greatly reduces that condition.
I had to do the same, basically any slight hill/incline between 45-55MPH lugged the engine and caused excessive vibrations so I'd have to shift to L and make sure to run at higher RPMs.

Haven't had to do that since going back to the stock engine tune with the GDE trans tune...
 
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In my case, the GDE tune, from the moment I installed it and started the truck was and is so much smoother then the stock tune.

I tow a 6K+ lb RV trailer with mine and at this point I'll just drive it, if it blows up I will deal with it at that time. I personally don't think the tune has anything to do with the small amount of failures that have happened. I'm more inclined to think it's more of a roll of the dice on the random injector/HPFP/wrist pin/piston failure that has caused the issues. I think that's why GM changed the injectors on the 19+ model years to avoid a possible class action if it kept happening.

I say drive and enjoy and forget about the moon falling out of the sky and killing us all!
 
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