DiabloSport 9266-R Trinity 2 GM 6.6L L8T Gas Unlock and Tune Kit
Product details
| Management number | 254660338 | Release Date | 2026/11/07 | List Price | US$463.92 | Model Number | 254660338 | ||
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The DiabloSport 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 DiabloSport’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 DiabloSport 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" 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")
- 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 ‘Keep 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
| Vehicle make | GM |
|---|---|
| Vehicle model | 2020-2023 Silverado 2500-3500, 2020-2023 Sierra 2500/3500 |
| Vehicle year | 2020, 2021, 2022, 2023 |
| Vehicle fitment type | Specific |
| Compatible cars | 2020-2023 GM 2500/3500 6.6 GAS |
| Brand | DiabloSport |
| Touchscreen | Y |
| Screen size | 5 in |
| Features | Touchscreen |
| Wireless | Wi-Fi |
| Display | Digital |
| Vehicle type | Truck, Car |
| Automotive parts division | Performance |
| Model | 9266-R |
| Items included | Trinity T2 on-dash tuner, Locksmith device, Harness |
| Accessories included | Locksmith device, Harness |
| Has written warranty | No |
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