so you were not able to flash the stock file back on the computer or?? I know they were working on trying to install spyware so that they could see the entire history but if it is installed in today's trucks it was not available when I got mine. There may have been a big legal fight over whether or not the manufacture could use spyware but I'm not sure bout that.

They look at the burn pattern on the piston tops. They know how a stock fueled diesel will look, and how a tuned one will. No matter if they have a way of knowing the computer was re flashed or not.

13k though is too much. If a dealer told me they were not going to warranty my engine, I'd take it right out of their shop. No way am I paying top dollar for stock/re manufactured parts. At 13k I'm building a race engine that will not blow, or searching ebay for stock parts.

In the end, you run the tuner at your own risk. Pay to play. Your safest with the duramax. They are tuner friendly, much more so than the 6.0l ford that doesn't need help from tuners to blow up.

On your LB7 use the tuner (whether super chips, diablo sport, ect) to read the DTC codes. You can run an injector balance check on the LB7s to find any early warnings of injector failure. If you have an big difference in injector balance numbers, then take the tuner out and have chevy warranty the injectors. I thought they finally had a fix for the injectors? If they don't you can retrofit LLY heads/fueling.. but that would cost more than simply replacing the injectors twice.

The goal is to watch your injectors carefully.. monitor fuel consumption, and balance rates.. this way you catch the problem before you loose an engine.

Now all late 07' and 08' Duramax computers can detect that they have been tampered with. They will not be able to figure out what you did even if you put it back to stock but it will show it has been altered before. It is completely undetectable in the computers in the older models. If you have a problem with an older model, they can only assume by inspecting the damage to the piston and the cylinder wall. There is no way for them to prove it!

General Motors Bulletin #06-06-01-007A:
Information on Identifying Duramax Diesel LB7,LLY,LMM,LBZ Overpower Engine Breakdown or Non-Function Due to Aftermarket Power-up Devices vs. Non Overpower Engine Non-Function of Pistons, Cylinders-(Sep 28,2007)

Generally, in inspection of Duramax engine failure due to power-up failures two or more cylinders will be affected.

A fuel injector failure may fracture a piston or melt a piston but the damage will be limited to that cylinder only and all other pistons and cylinder walls are Ok. In some cases, hydraulic lock will occur on the suspected cylinder with an over-fueling fuel injector. Hydraulic lock on the suspected cylinder will cause a bent connecting rod. This can be verified with piston protrusion measurements

Aftermarket Power-Up Kit Check List:
1) Piston cracked parallel to wrist pin.
.Piston cracked in lip area
.Hole in piston connecting top of piston to oil cooling channel
2) Melted Pistons.
.Lip of combustion bowl melted
.Top of piston melted/ missing
3) Cross hatching polished off cylinder wall.Cylinder wall missing crosshatch on major thrust face of cylinder below ring belt travel.
4) Piston pin bore,Wrist pin, and Rod bushing.
.Scoring in upper piston pin boss/black discoloration/ oil coking.
.Wrist Pin Wear.



This is what they are looking for.

Just for a heads up: The stock Allison Transmission is good for up to 700 lbs of torque! When you go past that, you need to upgrade the transmission and torque converter.

was reflashed stock, dealer told me they can detect a modification very easily, take pictures, send to manufacturer , voided warranty.

I have a 06 LBZ and think it is plenty strong/fast/good puller in stock form. Not that more power is nice, however I think the trade off with GM and their BS if it is tuned is to leave it stock.

Just put one on my 05 dodge and love it

No, the dealer cannot detect it unless it is late 07' or newer. The main reason you want to remove them when you take it to the dealer is, Most of the time if the factory has any new updates they will reflash your computer with them and you will loose your tune. The only pictures they can take will be of damage and they will still have to prove that whatever upgrades caused the said damage. It is case law. It is called the (Magnuson Moss Warranty Act)

Over on the Diesel Place (dieselplace.com), One guy reported that he had a LBZ that was making 520 Rwhp. He split the crank in two and took it back to the dealer and they waranteed it. Not that I would chose that route or support having GM warantee in those situations, but the warantee really depends on the dealer and other factors. I have heard that the newer 32 bit Bosch processors (LMM) can tell how many calibrations have been applied which can be an easy electronic way to detect mods....

If you are willing to write off your warantee completely and want to go balls out I would go with PPE or EFI Live. My truck has made just under 500 Rwhp with both setups. Be prepared to spend some cash on transmissions, lift pumps and all the other typical diesel stuff to get there though.... There are some other bonuses to the programmers when compared to the edge as well in that you can disable things like EGR check engine lights and DPF etc. The new edge boxes can read and clear the codes but they cannot make them go away permanently.

I just put a Edge Juice w/Attitude on a 08 Ram and saw all the things that it could do so I ordered one for my 05. You can do a lot more with the newer trucks than my 05, You can't clear codes or even monitor trans temps. I still love it though.

So if I was to take my truck in for a TSB for my transmission I would have to take the tuner off so it doesn't clear the tuner???

Yes I would recommend it.