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 Silverado 3500 HD)Find parts that fit my vehicle
Item SHS40543
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$818.95 each
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Product Information
Features, Description, Q&A, Specs & Installation
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 Silverado 3500 HD models.
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 (477)
Reviews of Diablosport Tuner products have an average rating of 4.7 out of 5
Apr 13, 2025
Review shared from Diablosport inTune I3 Platinum Tuner (99-16 5.3L Sierra 1500)
2014 -
Very Pleased!
Amazing performance. Super easy install, product came in packaged and protected very nicely. I paired this tuner with a C&L Throttle body spacer and S&B CAI. DiabloSport i3 Platinum (93) octane tune. Feels like a completely different truck. Gained 4mpg on average. Truck is a whole new animal.
Apr 7, 2025
Review shared from Diablosport inTune i3 Platinum Tuner and PCM Swap Kit (19-21 5.7L RAM 1500 w/ 8-Speed Transmission)
2019 Big Horn - CameronH.
Easy as pie.
Bought this tuner on a whim because I got tired of my stage 1 chip. Tuner can update over wifi which is fantastic. Can also be updated on PC as well. Menus are super easy to navigate and the 91 octane tune with the performance transmission tune has really woken my truck up. I could tell the performance difference on my first drive. This kit does come with a free PCM swap too. I got mine in about 3 days after everything was processed by Holley/Diablo Sport. Definitely recommend for a great performance gain for your daily driver without hitting up a dyno.
Apr 7, 2025
Review shared from Diablosport inTune i3 Tuner (14-16 5.3L Silverado 1500)
2015 LT -
Worth every penny
Used for resetting and sending canned tune for complete air intake upgrade. Well worth every penny
Apr 2, 2025
Review shared from Diablosport PredatorX Tuner (07-18 Silverado 1500)
2017 -
Worked great can definitely tell a difference and great value
Install was a breeze and love the trans tune shifts perfectly
Mar 31, 2025
Review shared from Diablosport inTune i3 Tuner (07-13 5.3L Silverado 1500)
2011 - Rcpatt
Amazing
The MPG booster tune works AMAZING, throw it on cruise control going down the highway and you’ll get an extra 20-30 MPG, I’ll fill up at a gas station and the truck will tell me “360 miles until empty” then when I get going it goes to 380 or 400, with the AFM off. The Booster tunes also work great, my buddies notice the difference as soon as I switch it into a booster tune, will dyno at a meet soon!
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.
Questions & Answers
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Will It Fit My Silverado 3500
- 6.6L V8 - 20, 21, 22, 23
