Skip to Product Info
    • Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport
    • Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport
    • Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport
    • Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport
    Sale!New!

    DiabloSport Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport 9266-R

    Vendor: DiabloSport
    SKU: CLNS_9266-R
    Save $122
    Sale Price $972.95 Regular Price $1,094.95
    Free Shipping on Orders Over $99
    Professional, Enthusiast-Driven Customer Support
    International Shipping Available - Contact Us!
    Payment & Security

    Payments are processed through secure, encrypted systems. Your credit card details are never stored or accessible by us.

    • Amazon
    • American Express
    • Apple Pay
    • Diners Club
    • Discover
    • Google Pay
    • Mastercard
    • PayPal
    • Shop Pay
    • Venmo
    • Visa

    The Diablo Sport Trinity T2 9266-R Kit is the breakthrough tuning solution for 2020-2023 GM 6.6L L8T gas trucks, finally giving owners the ability to unlock performance in these previously restricted platforms

    This complete kit includes the industry-leading Trinity T2 on-dash tuner, plus the required locksmith device and harness to unlock your truck's ECM.

    Once unlocked, the Trinity T2 delivers dyno-tested performance tunes for 87, 91, and 93 octane fuels, along with two transmission tunes to refine shifting and drivability

    Drivers can also take advantage of custom tuning support through Diablo Sport's CMR tuner network, making it easy to build dyno-calibrated files for bolt-ons or advanced upgrades

    User-adjustable features include throttle response, tire size calibration, speed limiter removal, and DFM disable New features for these trucks include last mode recall and Auto Start/Stop retention, so your truck always drives the way you want

    Beyond tuning, the Trinity T2 serves as a powerful digital monitor The vibrant five-inch color touchscreen displays real-time engine data with customizable gauge layouts, logs performance for playback with DV2 software, and allows you to set alerts for key parameters

    With built-in Wi-Fi and Expandable Accessory System (EAS) support, the T2 keeps your truck connected, customizable, and up to date

    For GM truck owners ready to unlock power, refine shifting, and take full control, the Diablo Sport Trinity T2 9266-R Kit delivers the performance upgrade you've been waiting for

    • 2020-2023 Silverado 2500-3500 6.6 L8T
    • 2020-2023 Sierra 2500/3500 6.6 L8T
    • 28 rwhp over stock on premium fuel
    • 50 rwtq over stock on premium fuel!
    • TCM Firm and Hard shift tune options for transmission
    • ECM unlock included!
    • Unlock and Tune, at home!
    • Preloaded tunes for multiple octane levels
    • Full color, 5 Inch touchscreen
    • Support for 6.6L L8T gas applications with 6 speed transmission
    • Front/Rear TPMS threshold adjustment
    • Throttle Boost setting for adjustable throttle feel
    • Adjust speedometer for larger tires (26-38 Inch)
    • 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
    • New РІР‚пїЅKeep Drive Mode Setting' allows you to select a drive mode and it will remember that mode next time you start the truck!
    • Transmissions adaptive relearn
    • Customizable gauge layouts and background images
    • Supports our Expandable Accessory System
    • Includes windshield mount

    Details:

    • Fuel Type: Gas
    • CARB (California) Compliant: No
    • Body Material: ABS
    • 5 Volt Data Logging Inputs: Yes
    • 50 State Legal: No
    • AC Adapter: No
    • Accepts Custom Tunes From CMR: Yes
    • Alerts and Records: Yes
    • Auto Dimming Screen: Yes
    • Case Included: No
    • Color Touch Screen Display: Yes
    • Custom Tuning: Yes
    • Data Logging: Yes
    • Emission Code: 7
    • Erases Fault Code: Yes
    • Grade Type: Performance
    • Instruction Manual Included: Yes
    • Performance Tests: Yes
    • Performance Tunes: Yes
    • Personal Computer and Mac Compatible: Yes
    • Product Type: In-Cabin Tuner
    • Software Included: Yes
    • Speedometer: Yes
    • Sub Category: Engine Service
    • Systems Covered: Transmission Engine
    • Upgradable: Yes
    • Video Capable: Yes
    • Wi-Fi Updates: Yes


    DiabloSport Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit Unlock and Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with Trinity 2! DiabloSport 9266-R


    Specifications:

    Country of Origin US
    Sold As Kit
    UPC 810065217400
    Availability Available
    Universal No
    Cylinders 8
    Harmonized Tariff Code 8512204040


    This Part Fits:

    Year Make Model Submodel Notes
    2020 GMC Sierra 3500 HD AT4
    2021 GMC Sierra 3500 HD AT4
    2022 GMC Sierra 3500 HD AT4
    2023 GMC Sierra 3500 HD AT4
    2020 GMC Sierra 2500 HD AT4
    2021 GMC Sierra 2500 HD AT4
    2022 GMC Sierra 2500 HD AT4
    2023 GMC Sierra 2500 HD AT4
    2020 Chevrolet Silverado 3500 HD WT
    2021 Chevrolet Silverado 3500 HD WT
    2022 Chevrolet Silverado 3500 HD WT
    2023 Chevrolet Silverado 3500 HD WT
    2020 GMC Sierra 2500 HD SLT
    2021 GMC Sierra 2500 HD SLT
    2022 GMC Sierra 2500 HD SLT
    2023 GMC Sierra 2500 HD SLT
    2020 GMC Sierra 3500 HD SLT
    2021 GMC Sierra 3500 HD SLT
    2022 GMC Sierra 3500 HD SLT
    2023 GMC Sierra 3500 HD SLT
    2020 GMC Sierra 3500 HD SLE
    2021 GMC Sierra 3500 HD SLE
    2022 GMC Sierra 3500 HD SLE
    2023 GMC Sierra 3500 HD SLE
    2020 GMC Sierra 2500 HD SLE
    2021 GMC Sierra 2500 HD SLE
    2022 GMC Sierra 2500 HD SLE
    2023 GMC Sierra 2500 HD SLE
    2020 Chevrolet Silverado 3500 HD LTZ
    2021 Chevrolet Silverado 3500 HD LTZ
    2022 Chevrolet Silverado 3500 HD LTZ
    2023 Chevrolet Silverado 3500 HD LTZ
    2020 Chevrolet Silverado 2500 HD LTZ
    2021 Chevrolet Silverado 2500 HD LTZ
    2022 Chevrolet Silverado 2500 HD LTZ
    2023 Chevrolet Silverado 2500 HD LTZ
    2020 Chevrolet Silverado 2500 HD LT
    2021 Chevrolet Silverado 2500 HD LT
    2022 Chevrolet Silverado 2500 HD LT
    2023 Chevrolet Silverado 2500 HD LT
    2020 Chevrolet Silverado 3500 HD LT
    2021 Chevrolet Silverado 3500 HD LT
    2022 Chevrolet Silverado 3500 HD LT
    2023 Chevrolet Silverado 3500 HD LT
    2020 Chevrolet Silverado 3500 HD High Country
    2021 Chevrolet Silverado 3500 HD High Country
    2022 Chevrolet Silverado 3500 HD High Country
    2023 Chevrolet Silverado 3500 HD High Country
    2020 Chevrolet Silverado 2500 HD High Country
    2021 Chevrolet Silverado 2500 HD High Country
    2022 Chevrolet Silverado 2500 HD High Country
    2023 Chevrolet Silverado 2500 HD High Country
    2020 GMC Sierra 3500 HD Denali
    2021 GMC Sierra 3500 HD Denali
    2022 GMC Sierra 3500 HD Denali
    2023 GMC Sierra 3500 HD Denali
    2020 GMC Sierra 2500 HD Denali
    2021 GMC Sierra 2500 HD Denali
    2022 GMC Sierra 2500 HD Denali
    2023 GMC Sierra 2500 HD Denali
    2020 Chevrolet Silverado 2500 HD Custom
    2021 Chevrolet Silverado 2500 HD Custom
    2022 Chevrolet Silverado 2500 HD Custom
    2023 Chevrolet Silverado 2500 HD Custom
    2020 Chevrolet Silverado 3500 HD
    2021 Chevrolet Silverado 3500 HD
    2022 Chevrolet Silverado 3500 HD
    2023 Chevrolet Silverado 3500 HD
    2020 GMC Sierra 3500 HD
    2021 GMC Sierra 3500 HD
    2020 GMC Sierra 2500 HD
    2021 GMC Sierra 2500 HD
    2020 Chevrolet Silverado 2500 HD WT
    2021 Chevrolet Silverado 2500 HD WT
    2022 Chevrolet Silverado 2500 HD WT
    2023 Chevrolet Silverado 2500 HD WT
    2022 GMC Sierra 3500 HD Pro
    2023 GMC Sierra 3500 HD Pro
    2022 GMC Sierra 2500 HD Pro
    2023 GMC Sierra 2500 HD Pro
    Shipping Policy

    Cancellations

    Once an order is placed, in most cases it cannot be cancelled as they are sent for fulfillment almost immediately after receiving the order. If there is an ability to cancel the order, the buyer is responsible for the transaction fees charged from the transaction.

    Processing Time

    In-stock orders are typically processed and shipped within 1–2 business days of receiving payment, unless otherwise stated on the product page. Orders placed on weekends or holidays will be processed on the next business day.

    Shipping Costs

    Shipping costs are calculated based on the shipping method selected, the weight and dimensions of the package, and the destination address. You can view the shipping costs for your order during the checkout process before finalizing your purchase.

    Tracking Information

    Once your order has been shipped, you will receive a shipping confirmation email with tracking information. You can use this information to track the status of your package and monitor its delivery progress.

    Delivery Time

    While we make every effort to ensure timely delivery, please note that delivery times may vary due to factors beyond our control, such as weather conditions or carrier delays.

    International Shipping

    For international orders, please be aware that customs duties, taxes, and other fees may apply upon delivery. These additional charges are the responsibility of the recipient and are not included in the shipping cost paid at checkout. Please check with your local customs office for information on potential fees before placing your order.

    Shipping Address

    Please ensure that the shipping address provided during checkout is accurate and complete. We are not responsible for orders shipped to incorrect or undeliverable addresses due to customer error.

    Return Policy

    Return Period

    You have up to 30 days from the date of purchase to return eligible items.

    Condition of the Item

    A 20% restocking fee will apply to cover inspection, processing, and repackaging costs.

    Items must be returned in new, unused condition and include all original packaging, hardware, and documentation.

    Return Shipping

    The cost of return shipping is the responsibility of the buyer unless the item was received damaged, defective, or incorrect.

    Return Authorization

    Before returning any item, please contact our customer service team to obtain a Return Merchandise Authorization (RMA) number. Items returned without an RMA may not be accepted.

    Refund Processing

    Once the returned item is received and inspected, we will initiate the refund process. Please allow 2–5 days for the refund to be processed and credited to the original payment method. Bank processing times may vary.

    Damaged or Defective Items

    If you receive a damaged, defective, or incorrect item, contact us immediately for assistance. We’ll work quickly to resolve the issue or send a replacement.

    Final Sale Items

    Certain items may be marked as Final Sale and are not eligible for return or exchange. These will be clearly noted on the product page.

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

    Recently Viewed