I keep getting these recall notices #08142. I don't know a lot about chips and such but thought I read something about if they do this reprogram I can NEVER chip my truck or get a programmer or anything. Right now I plan on keeping it stock but sometime in the future, like when my warranty is no good, I may want to do the DPF delete thing. i f anyone has any info I would appreciate it.

2008 GMC Duramax
Stock

I've had the ECM reprogram done and am running a programmer (Quadzilla). The only thing I am aware of is the PPE programmer needed to be sent back to PPE for reprogramming to be able to handle the GM reflash. I'm assuming that any PPE being bought new at this point would have had the update done but that would be something to verify first with the vendor/PPE. But in general, the update GM is doing does not affect your ability long term to add a programmer.

But in general, the update GM is doing does not affect your ability long term to add a programmer.

Can anyone else chime in to verify this, I usually like two or more opinions.

I could be wrong, but I was told they are doing it so they can detect if there was ever a tuner used on it. SOmeone may be able to confirm

The bulletin addresses a potential issue with the anti theft causing a no start condition. I haven't seen any negatives to this update. Next chance I get to look at a non updated ECM I will try to see if the Programing History is recorded.

All Kennedy Custom LMM ECM's are written on new cores with the absolute latest updates. The exception is when a customer has already installed a tuner so we make the new ECM his stock one and tune his original.

I would recommend having your ECM updated and never load any tuner to the original unit.

The bulletin addresses a potential issue with the anti theft causing a no start condition. I haven't seen any negatives to this update. Next chance I get to look at a non updated ECM I will try to see if the Programing History is recorded.

All Kennedy Custom LMM ECM's are written on new cores with the absolute latest updates. The exception is when a customer has already installed a tuner so we make the new ECM his stock one and tune his original.

I would recommend having your ECM updated and never load any tuner to the original unit.

Good advice. Regardless of update, GM can read the last 10 tunes on your ECM. I wish I had left my ECM virgin. Anyone have a stock ECM for sale? :rolleyes:

i dnt know if u already know this but i have been told that some of the programmers availible on the market can reflash the ecm and the dealer can not see the tune flash they read the last 10 flashes so u reflash the ECM 11 times and there is no more tune history .i was told this by a guy that sells and deals with tuners and programmers ,(he has done this him self and had no problems with the dealership and warranty claims)I beleive he said he was running a EFI live

i dnt know if u already know this but i have been told that some of the programmers availible on the market can reflash the ecm and the dealer can not see the tune flash they read the last 10 flashes so u reflash the ECM 11 times and there is no more tune history .i was told this by a guy that sells and deals with tuners and programmers ,(he has done this him self and had no problems with the dealership and warranty claims)I beleive he said he was running a EFI live

I'm not following you. If you reflash 11 times the the dealer is going to see the last 10 flashes you just did. I don't see how they cannot see EFI; they can see anything thats put into the ECM. You cannot even go to the dealer and reflash the same tune 10 times as it does not work that way.

On the LMM the CVN records the last 10 unique flash records. So by flashing your stock tune 1 time or 100 times back into your ECM you are only creating 1 unique record.

In terms of what a dealer can and cannot see, it's dependant on what the dealer does. If they look at the tune and it's stock, it's just stock - there is no hidden trace of a previous modified tune. If they check CVN, they can see that their is a different CVN to what GM programmed in the history, but they still can't determine what programmer was flashed in or what was contained within that program.

Cheers
Cindy

On the LMM the CVN records the last 10 unique flash records. So by flashing your stock tune 1 time or 100 times back into your ECM you are only creating 1 unique record.

In terms of what a dealer can and cannot see, it's dependant on what the dealer does. If they look at the tune and it's stock, it's just stock - there is no hidden trace of a previous modified tune. If they check CVN, they can see that their is a different CVN to what GM programmed in the history, but they still can't determine what programmer was flashed in or what was contained within that program.

Cheers
Cindy

Yes, and that's the problem. If I flash a simple economy tune, they won't believe me and if I have a defective tranny, they will not honor the warranty. GM is requiring techs, in the case of a powertrain warranty claim, to take a digital pic of the Tech2 screen showing the tune history and e-mail it to them before they will authorize the repair.

yah that only on the LMM's on the LBZ's they cant see jack!!!

yah that only on the LMM's on the LBZ's they cant see jack!!!

Are you sure? The memo applies to all DMaxes.

Are you sure? The memo applies to all DMaxes.
Earlier ECM's (LB7,LLY, LBZ) all contain CVN history, however they do not have the smarts that the LMM has. They simply record the CNV that is currently in the ECM not what has previously been installed. In this instance, you would need to leave a modified tune in your vehicle for a non standard CVN to be present. Once your stock tune is installed the standard GM CVN is returned.

If you have any concerns about your 08 LMM you should invest in a spare ECM. You'll find a number of EFILive vendors have spares for sale.

Cheers
Cindy

this may sound stupid but where is the ECM located on a LMM?and what is the cost of a spare stock ECM? ruffly

I believe Varty's right but Im not a tech so dont listen to me :D

yup

this may sound stupid but where is the ECM located on a LMM?and what is the cost of a spare stock ECM? ruffly

Let side down low. and I've seen them $150-$200 on eBay.

Let side down low. and I've seen them $150-$200 on eBay.
is that in the engine compartment or in the passenger compartment?and left side is what the passenger or driverside

I wouldn't bother getting a separate ECM. I've heard another thing they do is count the number of Regens. So, if you've swapped ECMs and kept your original as a virgin, then take it to the dealer, they will see you've only had so many regens, when it should have had waay more. pretty much no way around getting caught in the LMMs.

ECM and TCM are on the left side of the engine bay.

I wouldn't bother getting a separate ECM. I've heard another thing they do is count the number of Regens. So, if you've swapped ECMs and kept your original as a virgin, then take it to the dealer, they will see you've only had so many regens, when it should have had waay more. pretty much no way around getting caught in the LMMs.


X2 :)

I hate to say it guys. . . But why should they warranty something that is altered? GM issues the warranty based on the STOCK Truck and all of it's components. If you decide to start doing things to the truck that were not done when you purchased it and IT CAUSES the issue that you want repaired then I don't see why we would expect them to honor the warranty. Now on the other hand, if the mod has nothing at all to do with the issue and the dealer refuses the claim then that's another story.