[KBBrett]

Good evening everyone. I just got back from the local Chevrolet dealer and I got to see an LBZ that was being replaced. This engine only has 7k on it and it had a glow plug meltdown. Evidently the customer waited too long to get in for the re-flash and the damage had been done. It is quite obvious that a piece of the glow entered the combustion chamber and took out the piston and a couple of valves and valve seats. In speaking with the serveice manager, I guess GM is very surprised this happened and they want the PCM out of the truck to look for evidence of tuning on it. GM is putting a complete engine in , but I think you could get away with a piston and some head work. The service manager really pushed them for a complete engine. He said they seamed a little nervous about the amount of damage. So, how much evidence is left behind in the PCM if it has been tuned?I have heard some people say there is none, but given that GM wants it back makes me wonder. Just curious what you guys think.

 

[jepear15]

That is what I have read on here also. That they can't pick up your tune on your PCM. But if it is going to GM directly they might have some better eqiupment to check it with. Maybe?

 

[Max Power]

I know a guy who had this happen with 1000 miles. He was a little upset since he just traded in a problematic 6.0L Ford for what was supposed to be a better truck. They also changed the whole motor but it took a lot of convincing.

 

[redws6rocket]

i see duramax's changed out all the time for things they should not be changed out for. that is a very minor problem and should be taken care of!

 

[oteo125]

i have heard of other people having to send their computers in also. i wonder if gm can tell how long its been since a program was added. if they see the current program has only been in there a couple of days they would know it was changed back to stock before going in for repair.

 

[MaxRock]

That's one of the things I like about my VA...you unplug it and there is no traceability it was ever on the truck...except for the toggle switch.

MaxRock

 

[Jasondt2001]

I wonder if they only want the PCM to see if it was a fault on THEIR programming end? I've read a TSB that was posted (I think by mcrat; not absolutely sure though) that GM admitted that they cant tell if a programmer has been used but to be on the lookout for obvious signs.
I know that isnt word for word of the TSB; but, all i can think of is they want to see the glow plug initialization programming on their end to make sure this doesnt need to be another flash/recall if it's a continuing issue that's costing them money.
On the other hand; what do i know? LOL I just make payments

 

[Jasondt2001]

Here, check out the middle of the page - Posted TSB. If you want you can also read the whole post.
http://www.dieselplace.com/forum/showthread.php?t=124567&page=4&highlight=can+tell+about+tuners

 

[redws6rocket]

there still is no way to tell. the programmers either trick the pcm or change the settings on the latest calibration installed on the pcm. there is no way to trace that stuff back. i have about 5 d max replacements at a local dealership here that had major stuff done and no issues were ever brought up!

 

[MGlickLBZ]

I wonder if they only want the PCM to see if it was a fault on THEIR programming end? I've read a TSB that was posted (I think by mcrat; not absolutely sure though) that GM admitted that they cant tell if a programmer has been used but to be on the lookout for obvious signs.
I know that isnt word for word of the TSB; but, all i can think of is they want to see the glow plug initialization programming on their end to make sure this doesnt need to be another flash/recall if it's a continuing issue that's costing them money.
On the other hand; what do i know? LOL I just make payments

I was one of the fortunate or unfortunate ones that had to have their engine replaced. I was missing four glowplugs. The dealership that I dealt with was great but GM was a little tougher to deal with.

I think when GM means obvious signs it is toggle switches, pyrometers, intakes etc.

 

[thejdman04]

Id sure want my whole motor done, no head work on my 50,000 dollar truck, esp if it was trly bone stock

 

[chow2141]

its funny, my local dealership sell K and N intakes, MagnaFlow Exhausts, Hyper-Tec programmers, and green keys to name a few. I wonder what would chevy would say about that?????

 

[redws6rocket]

if gm can prove that your cat back or air intake made your duramax blow up i am all eyes and ears!!

 

[ChosenOne]

if gm can prove that your cat back or air intake made your duramax blow up i am all eyes and ears!!

Thats the problem...they don't have to prove anything. They only need to substantiate their claim that it could have played a role in the failure or that the OEM part could have prevented the failure.

 

[thejdman04]

An intake w/a poor filter could indead blow up your motor esp if your out running sand dunes. gravel pits (service truck) etc.