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6.6L programmer

Snorat

By Snorat
in 6.6L Gas V8 (L8T)

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  • 10 months later...
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davester
davester

It's my understanding that it's so expensive now (vs getting older trucks tuned) because the ECM is encrypted, and not many people have figured out how to get around the encryption, so prices are high

Ray Pickle
Ray Pickle

The issue as already stated is encryption.  There are plenty of tuners out there, just none that have the know how and/or capital to crack G.M.'s encryption. They're may be some truth to cost analysis

nick112288
nick112288

Which is why they need to either bring back 4.10s, give it a competitive transmission, or release the rumored big block.    Or best of all, all 3 available in a truck!

L8T Enthusiast

L8T

Posted
Posted

Year later, still nothing. 
Thing is don’t even think they need to crack the ecm or be able to flash it to make hp/tq changes. They could go old school like the old edge piggy back systems with sensor foolers and such. 

  • Like 1
  • 1 year later...
Kjduvall Enthusiast

Kjduvall

Posted
Posted

no way id use that gizmo tuning thingy, if its not hp tuners or equivilent . really from my understanding its encrypted pcm like the c8 vette. my personal dyno tuner guy says its gunna take a serious amount of time and effort for some one to do it. and he tunes 300 to 4000+ hp cars all the time for a living. so until somebody (cracks it open) its going to be damn near impossible. really sucks too, cause id like to do a tvs 2650 blower/ bigger injectors/ 1 7/8 headers/ true dual all 3in stainless and some e85. but i really dont see it happening.

davester Senior Enthusiast

davester

Posted
Posted

You really can't go wrong with a product where the support for it is described like this "RUSH-RUSH Help Center replaced former Magnum Tech Support"

 

It appears to not be a tuner, but rather just intercepts various sensors to trick the ecu into putting more fuel into the engine.

 

Just based off that one web page, it's not a product I would plug into my very expensive truck, even if they paid me to do it.

  • Like 1
  • 1 month later...
Mic_ Enthusiast

Mic_

Posted
Posted

sure

 

the BBB gives them a F

with multiple complaints

 

sky google address is a shipping yard

 

nothing can go wrong...just send you money

 

Dr1ft3r Enthusiast

Dr1ft3r

Posted
Posted (edited)

It seems that Whipple has cracked the ECU.

 

https://www.gm-trucks.com/forums/topic/262716-l8t-whipple-for-2020-2022-2500hd/

 

https://gmauthority.com/blog/2023/03/whipple-will-soon-launch-a-gm-6-6l-l8t-v8-supercharger-kit/

 

"The kit includes an HP Tuners RDT flash tool to reprogram the computer, as well as a VCM scanner for data logging and tire / axle adjustment."

Edited by Dr1ft3r
  • 10 months later...
GMC4Zee Enthusiast

GMC4Zee

Posted
Posted

This just out recently. Good news for all:

2020-2023 GM Silverado/Sierra 2500/3500 Truck 6.6L L8T Gas tuning has arrived! DiabloSport has combined their industry exclusive Locksmith device with the required ECM harness, and developed tunes specific to the L8T 6.6L Gas applications. The provided preloaded/preset tunes have shown gains of 28 RWHP and 50 RWTQ over stock, on good 93 octane gas! These are huge gains, that you'll feel when you stomp the go pedal! You can also adjust throttle response, tire size, speed limiter and more!
For those that want numbers thats 429 HP and 514 RWTQ!!! on 93 octane
  • Thanks 1
  • 1 month later...
BCGM Enthusiast

BCGM

Posted
Posted
On 3/27/2024 at 5:18 PM, GMC4Zee said:

This just out recently. Good news for all:

2020-2023 GM Silverado/Sierra 2500/3500 Truck 6.6L L8T Gas tuning has arrived! DiabloSport has combined their industry exclusive Locksmith device with the required ECM harness, and developed tunes specific to the L8T 6.6L Gas applications. The provided preloaded/preset tunes have shown gains of 28 RWHP and 50 RWTQ over stock, on good 93 octane gas! These are huge gains, that you'll feel when you stomp the go pedal! You can also adjust throttle response, tire size, speed limiter and more!
For those that want numbers thats 429 HP and 514 RWTQ!!! on 93 octane

Just curious would this apply to 2024 Chevrolet 2500 HD 6.6 engines ? Also what would change just using regular fuel ?

64BAwagon Senior Enthusiast

64BAwagon

Posted
Posted

93 octane is at least 75 cents more per gallon anywhere I have been. 

Part of the beauty of the L8T is that it runs on 87 regular. 

Not to mention the issue with warranty if GM finds you cracked into the ECM (and they will no matter who says otherwise) 

But thats just me and I am old and dont like drama. 

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
17 hours ago, BCGM said:

Just curious would this apply to 2024 Chevrolet 2500 HD 6.6 engines ? Also what would change just using regular fuel ?

 

 

 

No.  2024's use the GM Global B platform so new ECM and encryption.  2020-2023 are GM Global A. 

 

HP has access for the 1500s 2022.5+current which are also Global B, so I'd imagine they will announce support for 2024+ HD in the near future if they haven't already, so HP Tuners would be the only path I know of so far.  

Edited by newdude
KARNUT Senior Enthusiast

KARNUT

Posted
Posted
2 hours ago, 64BAwagon said:

93 octane is at least 75 cents more per gallon anywhere I have been. 

Part of the beauty of the L8T is that it runs on 87 regular. 

Not to mention the issue with warranty if GM finds you cracked into the ECM (and they will no matter who says otherwise) 

But thats just me and I am old and dont like drama. 

I did the program thing all the way to my last new truck. I like to feel I had some control. Eliminating top speed governors, backing off the shift nanny, raising shift points and the premium tune. I didn’t pay for gas so let her rip. That sometimes was the minimum but could be done the first weekend along with exhaust. I drove lots of miles so it helped with boredom. My avalanche I’ve done nothing. Not even exhaust it has a little sound. I only average 18 miles a day with it. The exhaust could still happen. If the engine quits, look out. A 400$ hand held tuner, probably not. That’s a first.

BCGM Enthusiast

BCGM

Posted
Posted
4 hours ago, newdude said:

 

 

 

No.  2024's use the GM Global B platform so new ECM and encryption.  2020-2023 are GM Global A. 

 

HP has access for the 1500s 2022.5+current which are also Global B, so I'd imagine they will announce support for 2024+ HD in the near future if they haven't already, so HP Tuners would be the only path I know of so far.  

Thank you NewDude !

BCGM Enthusiast

BCGM

Posted
Posted
2 hours ago, KARNUT said:

I did the program thing all the way to my last new truck. I like to feel I had some control. Eliminating top speed governors, backing off the shift nanny, raising shift points and the premium tune. I didn’t pay for gas so let her rip. That sometimes was the minimum but could be done the first weekend along with exhaust. I drove lots of miles so it helped with boredom. My avalanche I’ve done nothing. Not even exhaust it has a little sound. I only average 18 miles a day with it. The exhaust could still happen. If the engine quits, look out. A 400$ hand held tuner, probably not. That’s a first.

Karnut Thank you for the reply !   I'm not sure I understand your last sentence could you explain .

Thanks 

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    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      Ok I missed that part that yours is a GM. The strange part is that the choice for year ranges and within the year of 2026 is different on the Sierra then on the Chev for some reason as I am looking at my tool at the Sierra choices. Now I am guessing you see as to your sensor part number as it may be different on your truck for some reason and a call to GM should get you the part model number of the sensors you should have as well as which MHz your sensors are. I know mine are the ones as per what I listed but there are other choices in the Autel and got me wondering if by some chance they put different ones in your truck. Having said that, did you try using each of the choices starting from No 1 and going on down the list, not sure if that would mean shutting off the engine each time and resetting the tool and going at it again each time. Also I thought of something else which may sound retarded but if there was some stupid chance that the chev choice would work. The reason I say that is that the Sierra is showing a range up to 06/2026 for the various choices of sensors it could be where as the Chev has one choice that has that 12/2026. By the way it is possible to not run the truck and you may know that as per not pressing the brake but pressing and holding the start button for a few seconds and it lights up the dash ( its called service mode ) but that sucks battery power and if it were me doing it that way I would be throwing on a decent sized battery charger before doing it that way as killing your battery won't make you happy at me at all !.    Like I say, just a thought to try the Chev choices if you have already exhausted the Sierra choices but first it would be nice to know for sure what exact sensor model and hertz your truck uses as I assume only those choices that mention the sensor would work unless a choice that does not mention the sensor model would somehow work. Its frustrating when one is trying to use tools like this without the experience of the tool and the vehicle, as I am sure dealer techs themselves struggle with it when starting out or a new model year comes along that is slightly different. 
    • jgaudet99
      Tire psi

      By jgaudet99 · Posted

      I tried before I updated the scan tool just incase an update messed it up, but it never worked so I updated the scan tool and it still didn't work.   Only difference is I click on Sierra not Chevrolet cause I have a Sierra.   If I click on 2026-2024 I didn't have any option to change placard, when I click on 2023 it does give me the option but when I try to do it,.it says vehicle not supported!   I have my region or market or whatever it is set to America I think, is that what yours is set to?
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      Its just that it worked on 2024 trucks on this forum and my 2025 model truck, unless GM did something since that point to screw up access or Autel has a bad update. I haven't had need to use my tool since last year when I did the changes to the placard pressure settings and since then I updated the software on my Autel but have not plugged into the OBD so hard to say if I would get a surprise as well.    All I know last year when I bought the Autel I was warned to be sure to update it before I tried using the unit as they said who knows how long ago unit itself was actually manufactured as the software could be way out of date. 
    • Chuck FB
      Tire psi

      By Chuck FB · Posted

      And so you had gone through the process of registering and updating the tool and so on ?. All I can say is that on the front page as the tool fires up you go to advanced mode, then vehicle model comes up and you choose Silverado ( not the DRW or EV  since your a single rear wheel ) , then I think its choice 2 which is 07/2021 - 12/2026 ( 433mhz 13542523 ) as that is the series of tpms sensors and then go down to choice 5 which is tire type/pressure selection. Hit yes and it says to connect to OBD port and turn ignition on.    Having said this, I updated the software in my tool lately and these year range choices look different from the past due to them doing some updates it would appear and I have not connected up to the OBD port since last year so hopefully I am not in for a surprise with them screwing up the software and that it won't work on my truck anymore either.    So my question is, when you plugged into the OBD and started your truck it had that message on the Autel screen "vehicle not supported" ?. That does seem odd as tire shops would be pissed right off if hey can't use their tool on the model year after mine that in theory is supposed to be much the same truck ... unless GM did some change in the computer system to block certain things from access. 
    • Atlas
      Tire psi

      By Atlas · Posted

      Understanding and using modern scan tools is its own body of knowledge. I had little hope that would work...programming access to the BCM is probably required and that is not easy for us consumers. Expensive scan tool, GM programming subscription, online authentication, etc.   It also may be a matter of finding the right dealer to program it for you. Flashing a modern BCM might be a little too advanced for most tire shops.

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