The DiabloSport inTune 3 Unlock and Tune Kit unlocks and tunes 2020-2023 Chevrolet Silverado and GMC Sierra trucks with the 6.6L L8T gas engine. It includes the handheld tuner, locksmith device, and harnesses required to unlock the ECM, with preloaded tunes for multiple octane levels.
Overview
This kit is for 2020-2023 Silverado and Sierra 2500/3500 trucks equipped with the 6.6L L8T gas engine. It supports applications with a 6-speed transmission.
The kit is designed to unlock the ECM and tune the truck at home. Preloaded tunes are available for multiple octane levels, including tunes for 87 octane and premium fuel.
On premium fuel, the stated gains are 28 rwhp and 50 rwtq over stock.
Adjustments include throttle feel, speedometer calibration, speed and rev limiters, idle speed, fueling and spark timing at wide-open throttle, and front/rear TPMS thresholds.
Features
- 28 rwhp and 50 rwtq over stock on premium fuel
- Preloaded tunes for multiple octane levels, including 87-octane and premium-fuel tunes
- Throttle Boost setting for adjustable throttle feel
- Adjust speedometer for 26-38-inch tires or gear changes from 3.42 to 5.13
- Remove the speed limiter and adjust the engine rev limiter by up to +/- 400 RPM
- Adjust engine idle speed in Park/Neutral and Drive
- Keep Drive Mode Setting remembers the selected mode for the next startup
- Adjust fueling and spark timing at wide-open throttle across multiple RPM ranges
- Adjust front/rear TPMS thresholds and Air Filter Monitor system control
- Transmission adaptive relearn
What's Included
- inTune i3 handheld tuner
- Locksmith device
- Harnesses required to unlock the ECM
Specifications
- Brand: DiabloSport
- Part number: 8266-R
- Fitment: Unlock AND Tune your 2020-2023 6.6L L8T powered Silverado or Sierra, in your driveway with inTune 3!
- Emissions: Legal under the provisions of EPA's Tampering Policy - Not legal in CA
- UPC: 810065217394
Want more than the preloaded tunes? Pair this with our Custom Diablo Tune, built for your exact parts and fuel by N2 Speed.
Frequently Asked Questions
What vehicles does this kit fit?
It fits 2020-2023 Chevrolet Silverado and GMC Sierra 2500/3500 trucks with the 6.6L L8T gas engine. Support is specified for applications with a 6-speed transmission.
What does the kit do?
It unlocks the ECM and provides tuning with preloaded tunes for multiple octane levels. The stated gains on premium fuel are 28 rwhp and 50 rwtq over stock.
Is this product legal in California?
It is legal under the provisions of EPA's Tampering Policy, but it is not legal in California.
Emissions notice: not legal for sale or use in California or on any pollution-controlled vehicle where prohibited. Check your state's rules before ordering.
Fitment help: call 954-507-6261 or email sales@americanmuscleperformance.net with your VIN and we will confirm the right part before you order.
