The GMC 3500HD Speedometer Calibrator by Rough Country for the '24-'25 models is here to resolve your speedometer discrepancies. This easy-to-use device recalibrates your vehicle's speedometer to deliver precise readings when you've upgraded to larger tires, ensuring your driving experience remains accurate and reliable.

This Speedometer Calibrator is designed with effortless installation in mind. It's a plug-and-play device that connects directly to your vehicle’s Transmission Control Module (TCM) and Body Control Module (BCM). This simple connection allows for a speedy recalibration process, all without the need for complex setups or specialized tools. It not only corrects your speedometer but also updates your vehicle’s Engine Control Module (ECM) to accommodate larger tires. This adjustment ensures that your vehicle maintains precise shift points and recalibrates its Electronic Stability Control (ESC) for safe and smooth driving. An additional convenience is its capability to easily revert to stock settings whenever needed, such as before servicing or selling your vehicle.

Features

• Accurately resets the speedometer for precise readings when using larger tires.
• Effortless plug-and-play installation with no need for additional modifications.
• Optimizes OE ECM shift points to ensure seamless performance with bigger tires.
• Recalibrates Electronic Stability Control to maintain safety and control.
• Conveniently returns to factory settings when required.
• 1-Year Warranty offers peace of mind with guaranteed reliability.

For added peace of mind, the device comes with a comprehensive 1-year warranty, ensuring reliable results for years to come. Note that this programmer is specifically designed for models equipped with a 10-speed transmission and functions as a standalone unit, not compatible with any performance programmer. It’s restricted from sale or use in California and can only be used with one vehicle at a time.

If you have any questions or need assistance with installation, feel free to contact us directly. We have two locations in Austin, Texas, and the Los Angeles, California area, where we offer expert installation and customization services. Call us at 512-982-9393 for the Texas location and at 562-981-6800 for the California location. We're here to help you optimize your GMC 3500HD for the best driving experience!

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov