The DiabloSport inTune i3 Platinum + Unlocked PCM Kit is the all-in-one tuning solution for the 2019 Jeep Grand Cherokee 5.7L and 6.4L HEMI. Factory PCMs are locked to prevent tuning, but this package includes a DiabloSport Modified PCM and the inTune i3 Platinum handheld programmer (PN 8345), giving you everything you need to safely unlock your SUV’s hidden performance. Preloaded with dyno-proven calibrations, the inTune i3 Platinum delivers 20–25 rear-wheel horsepower gains, improved torque, and sharper throttle response. Transmission calibrations enhance shift timing and smoothness, creating a more responsive, more refined driving experience. The kit also provides the option to disable MDS (Multi-Displacement System), keeping your Jeep in full V8 mode whenever you want maximum performance and sound. For enthusiasts planning bolt-ons or future builds, the Platinum i3 supports CMR custom tuning, connecting you to DiabloSport’s nationwide tuner network for dyno-proven calibrations tailored to your modifications. Built-in data logging, diagnostics, and user-adjustable options give you full visibility and control over your Grand Cherokee’s performance. ⚠️ Important Note: On 2019 models, you must save your stock calibration with your tuning device before removing the factory PCM. Detailed instructions are included. For 2019 Grand Cherokee HEMI owners looking for real horsepower gains, MDS disable, and custom tuning flexibility, the inTune i3 Platinum + Unlocked PCM Kit is the ultimate upgrade.