Speedometer Calibrator | Chevy/GMC 2500HD/3500HD (24-26)

Complete the final touch on your lifted vehicle with Rough Country's Speedometer Calibration Device! Designed for ease of use, this device quickly and effortlessly recalibrates your vehicle's speedometer to ensure accurate readings when using larger tires. Resolve Speedometer Discrepancies with Ease: Your vehicle's computer is calibrated for stock tire sizes, meaning when you upgrade to larger tires, your speedometer will no longer reflect your true speed. With the Speedometer Calibration Device, you can eliminate this issue and restore accuracy. Plug-and-Play Installation: This plug-and-play device connects directly to your vehicle's TCM and BCM, making it simple to recalibrate your speedometer in just a few hours. No complex setup or tools needed. Optimized for Larger Tires: Rough Country's Speedometer Calibration Device doesn't just adjust your speedometer-it updates your vehicle's ECM to accommodate larger tires. This ensures precise shift points and recalibrates your electronic stability control (ESC) for safe and smooth driving. Easily Return to Stock Settings: Need to revert to factory settings? No problem! This device includes a convenient option to reset your vehicle's speedometer back to stock prior to servicing or selling. Complete Peace of Mind with a 1-Year Warranty: Enjoy worry-free performance with a 1-year warranty, ensuring your calibration device delivers reliable results for years to come.

Features

Accurately Resets Speedometer: Calibrates your speedometer for precise readings when using larger tires.
Effortless Plug-and-Play Installation: Simple and quick connection with no additional modifications required.
Optimizes OE ECM Shift Points: Updates shift points to ensure smooth performance with larger tires.
Recalibrates Electronic Stability Control: Adjusts ESC settings to maintain safety and control with bigger tires.
Convenient Return to Stock Settings: Easily revert to factory settings when needed.
1-Year Warranty: Offers peace of mind with a comprehensive 1-year warranty.

Notes

Download the latest software update here. ONLY fits models equipped with a 10-speed transmission. This programmer is designed to function as a standalone unit and is NOT compatible with any type of performance programmer. Emissions Certifications: Not for sale or use in California. Rough Country's Speedometer Calibrator can only be used with one vehicle at a time. As with all other programmers, once programmed, the programmer is locked to that vehicle and cannot be used with any other vehicle.

Instructions

View Instructions

The Kaos Run Down

Fitment Year: 2024 2025 2026

Make: GMC

Model: Sierra 2500 HD

Submodel: AT4

Drive: 4WD