DiabloSport inTune i3 (8200) Performance Programmer & Tuner for Silverado/Sierra 1999–2016 — Preloaded Tunes & Touchscreen

The DiabloSport inTune i3 (8200) is a plug-and-play handheld performance programmer that delivers preloaded, dyno-tested tunes and customizable vehicle adjustments for compatible Silverado and Sierra trucks without opening the hood.

If you drive a 1999–2016 Chevrolet Silverado 1500 or GMC Sierra 1500 equipped with a 4.8L, 5.3L, or 6.0L V8 and an OBD-II port, the DiabloSport inTune i3 gives you a fast, reversible way to tailor engine and transmission behavior. The device connects directly to the vehicle’s diagnostic port, provides touchscreen controls, and loads manufacturer-specific performance maps and calibration options through Wi‑Fi updates. It’s built to be accessible to DIYers while offering enough control for experienced tuners who want specific changes to throttle response, shifting, or speedometer calibration.

How does the i3 improve truck performance?

The inTune i3 includes dyno-validated performance tunes that alter engine and transmission calibrations to optimize power delivery and driveability for your truck’s engine. Tunes are developed for target gains while keeping safety parameters intact, and they are selectable from the device’s menu.

• Preloaded horsepower and torque-focused maps for 4.8L, 5.3L, and 6.0L V8s
• Improved throttle mapping for quicker response
• Transmission shift recalibrations for crisper upshifts and downshifts
• Fuel-economy oriented maps where available

What customizations can I make with Easy Tune and the touchscreen?

The inTune’s Easy Tune mode lets you alter common vehicle parameters without requiring deep technical knowledge. The responsive touchscreen guides you through options like tire size correction, speedometer recalibration, and rev/road-speed limit settings.

• Adjust tire circumference to correct speedometer and odometer readings
• Set speed and RPM limits to match aftermarket gearing or accessories
• Refine transmission shift points and firmness
• Save and switch between multiple tune profiles for different uses

How simple is installation and updating?

Installation is a true plug-and-play process: plug the i3 into the truck’s OBD-II port and follow on-screen instructions — no cutting, splicing, or wiring required. Firmware and tune updates are delivered over Wi‑Fi via a computer, keeping your device current with the latest calibrations.

• Direct OBD-II connection—no tools or permanent modifications
• Wi‑Fi updates compatible with Windows and Mac systems
• Fast tune flashing that can often be completed in minutes
• Restorable stock settings if you remove tunes later

Is the i3 supported and road-legal?

The inTune i3 is backed by a limited one-year warranty covering manufacturing defects, and it carries CARB EO D-770 for applications where California Air Resources Board executive order coverage applies. This helps you tune with added confidence while staying aware of emissions compliance where required.

• Limited one-year warranty against workmanship and material faults
• CARB EO D-770 approval for applicable models and regions
• Manufacturer support for tune selection and troubleshooting
• Revert-to-stock capability for resale or emissions testing

Who is this for? The DiabloSport inTune i3 is aimed at Silverado and Sierra owners who want a quick, reversible way to unlock tailored performance without mechanical modification. It's ideal for truck drivers who want improved throttle feel, smarter transmission behavior, correct speedometer readings after tire changes, or multiple tune profiles for towing and daily driving. If you prefer a handheld, touchscreen programmer with manufacturer-specific tunes and the convenience of OBD-II plug-in installation, the inTune i3 is designed for your truck and skill level.