Duramax Diesels Forum Truck of the Week
  #736  
Old 10-19-2018, 01:06 PM
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So who's software/firmware is loaded on the new chip? I suspect it is a bootleg GM L5P. I couldn't imagine that HP tuning built one from scratch and managed to get it to talk with all of the other modules in the truck
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  #737  
Old 10-21-2018, 06:38 AM
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Originally Posted by 2004LB7 View Post
So who's software/firmware is loaded on the new chip? I suspect it is a bootleg GM L5P. I couldn't imagine that HP tuning built one from scratch and managed to get it to talk with all of the other modules in the truck
It's probably running GM's stock programming. I could be wrong and these processors could be different, but think of your home PC - your OS, apps and files don't live on the CPU - they are on your HDD/SSD. The CPU just processes the data and makes it all work. The older LS1 PCMs stored their programming on a small flash chip that has no processing capabilities. The CPUs on the new ECMs may have flash memory onboard, but in the end, it's a CPU. My guess is they are replacing it because the 'feature' that does the signature verification (which is what is the tuning 'speedbump') is a part of the CPU that can't be 'turned off' (once it's on, it's on, or the CPUs are made either with it or without it), so they're replacing the CPU with one that doesn't have the 'feature' enabled. As for why GM's tools would no longer be able to flash the ECM, my guess is the flash process is looking for that signature verification, and if it doesn't get it because it's not enabled in the CPU, it'll fail.
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Last edited by Cougar281; 10-21-2018 at 05:17 PM.
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  #738  
Old 10-21-2018, 09:14 AM
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I agree with Cougar281. My only thought is the new CPU just has a different key loaded, and verifies a different signature. So HPT puts a new CPU on, and signs the stock program with their key, which the new CPU accepts. That would also explain why it won't accept a reflash from GM, since it no longer honors the GM key.
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  #739  
Old 10-21-2018, 05:18 PM
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I agree with Cougar281. My only thought is the new CPU just has a different key loaded, and verifies a different signature. So HPT puts a new CPU on, and signs the stock program with their key, which the new CPU accepts. That would also explain why it won't accept a reflash from GM, since it no longer honors the GM key.
That's a possibility too. Hadn't really thought of that one, but that could explain why it can only be tuned by HPT.
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  #740  
Old 10-22-2018, 08:44 AM
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They changed the lock on the door...........locked GM and everyone out, its the same as GM did, kinda funny in a way............there had to be some kind of info gotten from GM IMHO on how to change the lock.



I guess the fact that no reverse engineering of GM's key was done it is as simple as changing the lock but leaving the contents the same..........that is where it gets sticky...........but we can leave that to the lawyers and courts to figure out, if it goes there...............
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  #741  
Old 10-22-2018, 12:58 PM
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Quote:
Originally Posted by GMC_2002_Dmax View Post
They changed the lock on the door...........locked GM and everyone out, its the same as GM did, kinda funny in a way............there had to be some kind of info gotten from GM IMHO on how to change the lock.



I guess the fact that no reverse engineering of GM's key was done it is as simple as changing the lock but leaving the contents the same..........that is where it gets sticky...........but we can leave that to the lawyers and courts to figure out, if it goes there...............
Its not any different than any of the DSP or CSP tunes that EFILive claims as theirs yet it's 99.99% OEM Code. And no info is needed from GM. Just an understanding of how processors work. Just think LB7 & LLY locking. No real need to over complicate it.
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  #742  
Old 10-22-2018, 08:04 PM
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Quote:
Originally Posted by chavez91 View Post
Its not any different than any of the DSP or CSP tunes that EFILive claims as theirs yet it's 99.99% OEM Code. And no info is needed from GM. Just an understanding of how processors work. Just think LB7 & LLY locking. No real need to over complicate it.
I would argue that is not AT ALL the case - the older ECMs - LB7, LLY, LBZ, LMM and probably even LML, would generally accept whatever you tried to flash them (within reason), even if it had issues which caused it to brick - what has been done here is different. With previous generations, all tuning was done on a GM OS. With the DSP & CSP, yes, it was largely a GM (or Cummins) OS that was modified to accept multiple tunes based on specific inputs. But in the end, it was not corrupted and acceptable for the processor, so it ran. With the L5P, the same *could* apply, *except* for the signature verification part. I won't claim to know EXACTLY how it works - whether it's part of the CPU, the flash memory, or some combination, but the fact that they are replacing the CPU suggests that it's part of the CPU.

That being said, what Dave and Tony said makes total sense. They could have replaced the CPU with one that had no keys to the door - but that would have allowed other companies like EFILive to tune any ECM that they unlocked - In my opinion, I think that's a bit overboard, since at this point, they're charging a nice chunk to unlock, but whatever - point being, all they appear to have have done is changed the lock on the door (While I hadn't thought of this, I met Tony a number of years ago, and IMO, he is and was a straight shooter, so if he says that IS what they did, I personally have no reason to doubt him), not what is behind it any more than was the case for non-DSP or CSP OSes from EFILive - where all we did was read what was in the ECM, make changes and flash it back. In the end, I strongly suspect that the HPT L5P tuning is no different from HPT or EFI tuning of LB7, LLY, LBZ, LMM and even to a degree, LML tuning, (except for the DSP OSes), with the only exception being the signature verification (keys), which they have changed in their modded processors.

To break it down to the most basic level, it's no different than EFILive's ability to lock ECMs by changing it's seed/key pair which prevents reads and writes (except for the newer ECMs like the LBZ, LMM and maybe LML that allow writes but not reads, however that works). Just a different mechanism is used.
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300.59' 3rd place first pull

Best 1/4 times:
Truck: 14.067 @ 96.29, weighing in at over 7200#
446.4RWHP/820.2RWTq
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  #743  
Old 10-25-2018, 02:12 PM
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Quote:
Originally Posted by chavez91 View Post
Its not any different than any of the DSP or CSP tunes that EFILive claims as theirs yet it's 99.99% OEM Code. And no info is needed from GM. Just an understanding of how processors work. Just think LB7 & LLY locking. No real need to over complicate it.

My understanding of the process is the lock could not be picked from GM, the method was essentially unbreakable, so instead of trying to pick a lock they replaced the lock...........


I do agree that EFI-Live does change the seed key pair for LB7 and LLY and they do change things with respect to the "PATCH" they apply to prevent LBZ/LMM and Cummins Reading of the ecm via OBD.

But GM did not implement a SHA Hash and lock out the boot pin on the previous model ecms, so they probably were not worried about it too much.

I know why they did what they did with respect to the SHA and the method, due to vehicle WIFI and the nanny state controls for crash avoidance measures, drive by wire, as well as autonomous braking and steering by the vehicle its got to be locked down hard.

My new 2019 has a teen mode and a valet mode I can set, so the ecm and the code is pretty advanced, I can assume if you can hack/reverse that method you might be able to employ a factory DSP3 with the tables and code that exists...........

I have my spare ecm and tcm sitting here with a new 2019 with 639 miles on it........I will dig into this soon enough.

But I still think GM is not going to sit by on this one........hoping they don't care, but ya never know what they are going to do........
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  #744  
Old 10-25-2018, 04:16 PM
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  #745  
Old 10-25-2018, 04:32 PM
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Has anyone on here done exhaust on one yet? I'm curious on how hard the cat is to squeeze out? Will be interesting to see how much it will actually cost to do a full delete.
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  #746  
Old 10-25-2018, 06:08 PM
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I remember reading some where on a post from Kory that the turbo needs to be removed to get the cat out.

Also, when using the HP tuners software. Are tuners able to lock there files? Kory just posted up something on Facebook stating if anybody steals his files, he will be able to trace them rather quickly.
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  #747  
Old 10-25-2018, 06:13 PM
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Originally Posted by Yngdmax92 View Post
I remember reading some where on a post from Kory that the turbo needs to be removed to get the cat out.

Also, when using the HP tuners software. Are tuners able to lock there files? Kory just posted up something on Facebook stating if anybody steals his files, he will be able to trace them rather quickly.
Isn't that like calling the cops when someone steels your drugs? Lol
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  #748  
Old 10-25-2018, 06:16 PM
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Korys Post from today. Sounds like someone already has something.


L5P stuff is ready to rock out to the public. Shipped some orders today! I am not sending out toooo much right before SEMA, but there are going to be some wicked L5Ps rocking some sweet PPEI tuning!!!!! The files freaking run amazing... by far best work yet.

**PUBLIC "TUNER" WARNING**
I know who those are running and selling our stolen base files on earlier models...I fact check everyone and everything... It is how the industry works. These L5P files have more potty stains in them than I can count and I put them together in such a way that it will be VERY obvious when they are stolen - if they ever are. Be noted - anyone that jacks these files I will do all I can to expose everything I possibly can of you from beginning to end. I have TONS of time and money in this platform and I will go to the full extent to make it known not to take our stuff without serious repercussions and damage to a reputation. This will be the only time I talk about it and now we can all go enjoy our happy lives! :-)

Rock on folks!

P.S. ** - Anyone waiting on me for things... I'll have ya filled early AM!

Photo: Sal Pietrandrea (Your ECU shipped today :-) )

#PPEI #PSA
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  #749  
Old 10-25-2018, 06:22 PM
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Quote:
Originally Posted by Yngdmax92 View Post
Korys Post from today. Sounds like someone already has something.


L5P stuff is ready to rock out to the public. Shipped some orders today! I am not sending out toooo much right before SEMA, but there are going to be some wicked L5Ps rocking some sweet PPEI tuning!!!!! The files freaking run amazing... by far best work yet.

**PUBLIC "TUNER" WARNING**
I know who those are running and selling our stolen base files on earlier models...I fact check everyone and everything... It is how the industry works. These L5P files have more potty stains in them than I can count and I put them together in such a way that it will be VERY obvious when they are stolen - if they ever are. Be noted - anyone that jacks these files I will do all I can to expose everything I possibly can of you from beginning to end. I have TONS of time and money in this platform and I will go to the full extent to make it known not to take our stuff without serious repercussions and damage to a reputation. This will be the only time I talk about it and now we can all go enjoy our happy lives! :-)

Rock on folks!

P.S. ** - Anyone waiting on me for things... I'll have ya filled early AM!

Photo: Sal Pietrandrea (Your ECU shipped today :-) )

#PPEI #PSA
Ahhh. Coming from the guy who stole the trans tuning from spartan. Lol
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  #750  
Old 10-25-2018, 06:35 PM
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Kory has some cool tables he has found in his stuff, I'd be pissed too if someone stole it.
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