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7220 Predator Tuning

SRT8dan

By SRT8dan
in Modifications & Accessories

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SRT8dan Enthusiast

SRT8dan

Posted
Posted

I have a 2018 Silverado 1500 High Country with the 6.2 engine.  Recently purchased a DiabloSports Predator 2 tuner, which to my dismay, does not have anything for the 8L90 transmission.  Does anyone know why?

dieselfan1 Senior Enthusiast

dieselfan1

Posted
Posted

As far as I know there is no tuning available for the eight speed.


Sent from my Pixel 3 using Tapatalk

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

The TCM's are "locked" and none of the handheld tuners can do anything with them.

 

HP Tuners is the only way to tune the 8 speeds on 2017-2018 trucks. You'd have to send in your TCM to HP Tuners, pay the unlock fee and then pay the fee to license that TCM with HP Tuners. To fully tune a truck like yours would cost about $900 I believe. HP Tuners is $300, plus $200 for the PCM unlock, plus $~200 for the TCM unlock and $200 more for the TCM license. Then you have to learn how to tune it youself and your truck will be down for a few a week with the TCM unlock service.

SRT8dan Enthusiast

SRT8dan

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Posted

Thanks CamGTP.  For that kind of money, I am beginning to believe the trans shifts just fine the way it is.  I wasn't thrilled the way Diablo Sports sells the Predator Tuner.  They never mention the additional $40 for the GM unlock feature nor do they say anything about the inability to do anything with the transmission.

Nitrousbird Enthusiast

Nitrousbird

Posted
Posted
On 12/26/2020 at 1:32 PM, CamGTP said:

The TCM's are "locked" and none of the handheld tuners can do anything with them.

 

HP Tuners is the only way to tune the 8 speeds on 2017-2018 trucks. You'd have to send in your TCM to HP Tuners, pay the unlock fee and then pay the fee to license that TCM with HP Tuners. To fully tune a truck like yours would cost about $900 I believe. HP Tuners is $300, plus $200 for the PCM unlock, plus $~200 for the TCM unlock and $200 more for the TCM license. Then you have to learn how to tune it youself and your truck will be down for a few a week with the TCM unlock service.

Truck won't be down a few weeks.  1-3 business days if you send them yours + shipping, which is $199.  Or send them another TCM and they will program it for you for $299 then you just swap TCM's and have zero down time.
 

It would be $900 all in, plus $250 if you go with the Pro Feature set (useful for adding wideband logging).  
 

In 2 years when my warranty is up, I'll be doing this on my truck for E85 tuning and a little other stuff.  Currently buying it + wideband for my car now to retune the hack job a "pro" tuner did on the car by the previous owner.

CamGTP Senior Enthusiast

CamGTP

Posted
Posted (edited)

They sell a AEM can-bus wideband, I use one. Saves you $250 so you don't need the wideband plus the pro feature set.

Edited by CamGTP

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