SKU: 84398565494

Unlock AND TuneinTune 3 for 2020-2023 6.6 L8T Unlock and Tune Kit 8266-R

Sale price$391.03 Regular price$434.48
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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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Description

Unlock AND TuneinTune 3 for 2020-2023 6.6 L8T Unlock and Tune Kit 8266-RThe 2020 2023 6. 6 L8T GM gas trucks have been locked down since their introduction. Owners of these trucks have been waiting patiently for a tuning solution, and DiabloSport has delivered in a big way! The new 8266 R kit includes our inTune 3 handheld tuner, along with our industry exclusive locksmith device and harnesses required to unlock the ECM in your truck. Once unlocked, the inTune 3 offers up tunes for 87, 91 and 93 octane fuels, as well as 2

The 2020-2023 6.6 L8T GM gas trucks have been locked down since their introduction. Owners of these trucks have been waiting patiently for a tuning solution, and DiabloSport has delivered in a big way! The new 8266-R kit includes our inTune 3 handheld tuner, along with our industry exclusive locksmith device and harnesses required to unlock the ECM in your truck. Once unlocked, the inTune 3 offers up tunes for 87, 91 and 93 octane fuels, as well as 2 transmission tunes to choose from. Beyond the preloaded tunes, we offer a host of user adjustable parameters, like throttle response, speed limit, tire size, and more. We've even added some new features for drivers of these newer trucks, like the ability to recall your last mode setting! Get power you can feel, with DiabloSport!


Features:

  • ECM unlock included!
  • Unlock and Tune, at home!
  • Preloaded tunes for multiple octane levels
  • Support for 6.6L L8T applications with 6 speed Transmission
  • Throttle Boost setting for adjustable throttle feel
  • Adjust speedometer for larger tires (26"-38")
  • Calibrate speedometer for gear change (3.42-5.13)
  • Remove speed limiter for increased top speed
  • Adjust engine rev limiter for increased RPM range (+/- 400 RPM)
  • Adjust engine idle speed in Park/Neutral and Drive
  • ?Keep Drive Mode Setting? allows you to select a drive mode and it will remember that mode next time you start the truck!
  • Adjust fueling at WOT in multiple RPM ranges
  • Calibrate spark timing at WOT across multiple RPM ranges
  • Front/Rear TPMS threshold adjustment
  • Air Filter Monitor system control
  • Transmissions adaptive relearn

Specs:

Brand DiabloSport
Emission Code 7
Product Type Hand Held Programmer
Sale Category Tuners and Programmers
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 84398565494

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Talia O
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★★★★★ 5
This is not good heat tape.
Number of Items: 2
I bought this for sublimation and t-shirt making and because you get a lot for a decent price. Well, just spend the money on the good golden tape because this stuff doesn't hold up like that. I had a few cups ruined because the tape released while in the oven. Not cool at all. I don't have a LLC to buy cups in bulk, so it wasn't 1 or 2 bucks this take ruined. So be aware that this tape is poop before using.
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Reviewed in the United States on November 14, 2023
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Javonne Nicole Turner
Battle Creek, US
★★★★★ 5
A must have.
Number of Items: 6
I recently purchased the MEBMIK 6 Rolls 20mm x 33m (108ft) Blue Heat Tape High Temperature Heat Resistant Tape for Heat Sublimation Press Vinyl, and I couldn't be more satisfied. This tape has truly exceeded my expectations. One of the standout features is that it doesn't leave any marks or residue behind, which is crucial for a clean, professional finish. It holds up well under high temperatures, making it perfect for heat sublimation and vinyl projects. The tape is durable and reliable, ensuring my projects come out looking great every time. Overall, I highly recommend this heat tape for anyone involved in heat transfer or sublimation projects. It's an excellent product that performs exactly as promised.
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Reviewed in the United States on June 18, 2024
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ChrisFromTexas
Lowell, US
★★★★★ 5
Works well and easy to use for sublimation
Number of Items: 6
I’ve been using this heat tape for a few different sublimation projects—mugs, shirts, and a couple of random DIY gifts. It holds up great under heat. No slipping, no weird residue left behind on my blanks, and it peels off cleanly every time. The stickiness is just right—not so strong that it’s a pain to remove, but strong enough to keep designs in place while pressing. I also like that you get several rolls in the pack, which makes it a great value for the price. It’s easy to work with and cuts cleanly, which is helpful when you’re lining up small designs. Overall, this has made my sublimation process a lot smoother.
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Reviewed in the United States on July 22, 2025
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Dani Linse
Los Angeles, US
★★★★★ 5
Perfect heat tape
Number of Items: 6
This is the only heat resistant tape I'll use - hasn't failed me.
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Reviewed in the United States on May 5, 2026
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RPPerry3
Fort Morgan, US
★★★★★ 5
Great for patch hat pressing, no discoloring or marking during transfer
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Bought to hold my leather patches down while pressing them to hats, and they work great. They have not left any residue or discoloring when pressing hats, even with white patches. Very happy with how these perform and would recommend to others who make patch hats.
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Reviewed in the United States on January 25, 2026

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