2020-2025
2015-2019
2007-2014
2001-2006
Installation Time
(approx) 30 Minutes
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
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Diablosport Trinity 2 Tuner with ECM Unlock (20-23 6.6L Gas Sierra 2500 HD)Find parts that fit my vehicle
Item HG40187
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Our Price
$858.95 each
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Product Information
Features, Description, Q&A, Specs & Installation
Features
- Tuner with ECM Unlock
- Offers Tunes for 87, 91, and 93 Octane Fuels
- User-Adjustable Parameters
- Throttle Response, Speed Limit, Tire Size, and DFM Disable
- Recall Last Mode Setting
- Retain Auto-Start-Stop Setting
- Full Color 5-Inch Touch Screen
- Real-Time Monitoring of Vital Engine Data with On-Screen Gauges
- Internet Updateable
- Quick and Easy Setting Up
- Limited 1-Year Warranty
- Fits 2020-2023 6.6L Gas Sierra 2500 HD Models
Description
Advanced Tuning Capabilities. The Diablosport Trinity 2 Tuner is a powerful tuning device that allows for ECM unlock and offers a variety of tunes for 87, 91, and 93 octane fuels. This tuner enables users to adjust various parameters, enhancing throttle response, speed limit, tire size, and DFM disablement for improved performance.
Construction and Appearance. Featuring a full-color 5-inch touch screen, the Diablosport Trinity 2 Tuner provides an intuitive and interactive user interface. The robust construction ensures durability, while the sleek design complements the interior aesthetics of your vehicle.
Other Features. This tuner also retains the auto-start-stop setting and recalls the last mode setting, ensuring a seamless driving experience. Additionally, it offers real-time monitoring of vital engine data with on-screen gauges for comprehensive performance insights.
Installation. Setting up the Diablosport Trinity 2 Tuner is quick and easy, requiring no drilling. Most users can install it with minimal effort and basic tools.
Warranty. The Diablosport Trinity 2 Tuner comes with a limited 1-year warranty.
Application. This Diablosport Trinity 2 Tuner fits 2020-2023 6.6L Gas Sierra 2500 HD models.
Fitment:
- 2020 GMC Sierra 2500
- 2021 GMC Sierra 2500
- 2022 GMC Sierra 2500
- 2023 GMC Sierra 2500
Diablosport 9266-R
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Tuner with ECM Unlock
4.7
Reviews of Diablosport Tuner Products (472)
Reviews of Diablosport Tuner products have an average rating of 4.7 out of 5
Nov 28, 2024
Review shared from Diablosport inTune 3 Tuner with ECM Unlock (20-23 6.6L Gas Sierra 2500 HD)
2023 AT4 - CoryDesisto
Good power
After install was complete you could notice the power right away. More responsive. Have not noticed better gas mileage yet
Mar 30, 2024
Review shared from Diablosport inTune i3 Tuner (07-16 6.0L Sierra 2500 HD)
2016 Denali - Chrissotelo
Tuner review
It is a great tuner I don’t have any issues at all and it has lots of options!
Oct 24, 2022
Review shared from Diablosport inTune i3 Tuner (07-16 6.0L Sierra 2500 HD)
2016 Denali - CNewton
Easy Power
I received the tuner just a couple days after completing my order. The tuner is very easy to use and the power, MPG, and calibrations are great.
Mar 25, 2025
Review shared from Diablosport inTune I3 Platinum Tuner (99-16 5.3L Silverado 1500)
2016 High Country - CarlosMendoza
Diablo Tuner
So far so good. could definitely feel the difference. going to run it on the current tune for a whole full tank and see gas mileage. will keep update
Mar 21, 2025
Review shared from Diablosport inTune i3 Tuner (09-13 6.2L Sierra 1500)
2013 Denali - Ferris
6.2 denali install
Transmission shifts are awesome at full throttle, having no governor is nice can actually go over 97mph lol.
Mar 15, 2025
Review shared from Diablosport inTune i3 Tuner (14-16 5.3L Sierra 1500)
2014 Base - DennyE
Great product
Fixed the one major issue i had with my truck...the lagging throttle pedal. Since i bought the truck i never liked how much pedal travel you had to apply to get going...this sharpened it right up. the first time i drove it I was like WOW ITS FIXED. Updating the software was super easy and only took a few minutes on my desktop. Would highly recommend. Performance was a mild increase but my truck is stock so far.
Mar 10, 2025
Review shared from Diablosport inTune I3 Platinum Tuner (99-16 5.3L Sierra 1500)
2006 SLT -
Easy to use immediate results
This tuner is super simple to use. I just have it set up on the 87 tune with tire size adjusted currently. My truck is a ranch rig so it pulls a trailer more often than not. After the tune pulling has become much easier, especially through the mountains. I was actually able to maintain 65 mph the entire time while towing through the mountains which has never happened usually I see 45-55 mph through that area just because of the gradient changes. Truck didn’t even struggle. Out of everything I’ve done to this truck this is one of the best investments.
Mar 9, 2025
Review shared from Diablosport Trinity 2 EX Tuner (11-14 6.2L F-150)
2012 SVT Raptor - Luckydad2x
It's OK overall
It looks good and seems to do what it should but it's flawed. The customization screens are bad. They're difficult to figure out because they all say something like default under every gauge. It should say what each gauge is specifically. The other thing that annoys me is that it freezes up quite a bit when you try to load different screens. It requires unplugging and restarting. And none of this is new. I've seen these issues in reviews that are years old but I just hoped that the company would have figured out how to fix it by now.
Mar 7, 2025
Review shared from Diablosport Sprint AFM Module with Auto Start/Stop Disable (07-20 Yukon)
2016 Denali -
They don’t price match
I found this on Diablo tuners site after for $40 cheaper and they wouldn’t match the price. They just wanted to give me a in store credit. I’m just trying to find something to buy that’s cheap just to burn up the credit. What BS. I’ve since shopped elsewhere and spent thousands because they can’t refund me $40. Their lose!
Mar 5, 2025
Review shared from Diablosport inTune I3 Platinum Tuner (99-16 5.3L Silverado 1500)
2016 LT -
Easy to use
Took about 5 minutes to reprogram my vehicle and did notice an increase in performance. I like the fact that I could disable the shift to 4 cyl operation
Questions & Answers
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Will It Fit My Sierra 2500
- 6.6L V8 - 20, 21, 22, 23
