GM Duramax EZ LYNK LMM/LML/L5P Tune Package (2007.5-2023)

Wireless tuning support and live diagnostics for GM Duramax. The EZ LYNK Duramax platform combines cloud-based tune delivery, real-time data monitoring, and remote technician access for supported 2007.5–2023 Duramax trucks. With the Auto Agent 3 and mobile app, you can manage files and troubleshooting without manual cable transfers.

Note: Tuning support is not available for PTO-equipped vehicles.

The EZ LYNK Auto Agent 3 connects to your Duramax through the OBD2 port, then links to the EZ LYNK app via Wi-Fi. This creates a direct line between your truck and your technician for tune updates, calibration delivery, diagnostics, and data logs—all through the cloud. It’s a streamlined workflow for owners, shops, and fleets who want modern tuning and support with minimal downtime.

Important for 2017–2023 L5P Owners

L5P Switch-On-The-Fly (SOTF) tuning is controlled through factory steering-wheel buttons. Because switching happens through the truck’s built-in controls, no external SOTF switch is required or included. This keeps the setup clean and factory-like while maintaining full functionality.

Vehicle Fitment

• 2007.5–2010 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD Pickup – LMM
• 2011–2016 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD Pickup – LML
• 2011–2014 Chevrolet Silverado / GMC Sierra 3500HD Cab & Chassis – LML
• 2017–2023 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD Pickup – L5P

2017–2018 L5P Note: These years require a GM E41 ECM Unlock Service or an unlocked ECM.

Platform Compatibility

• Web Portal: Access and manage tune files from any browser.
• EZ LYNK App: iOS 12.0+ and Android 8.0+ supported.

What’s Included

• EZ LYNK Auto Agent 3 interface
• Cloud-based tuning and file management access
• Wireless diagnostics and data logging through the EZ LYNK app
• Remote support workflow for technician/tuner access (authorization required)

Features

• Fast Setup – Plug into OBD2, connect via Wi-Fi, and manage everything through the app.
• Advanced Diagnostics – Read/clear DTCs, view live data, and share logs with your technician.
• Over-the-Air Updates – Receive firmware and supported calibration updates wirelessly.
• Cloud Tune Management – Access and install tune files without manual downloads or email transfers.
• VIN-Locked Integrity – Automatic syncing supports consistent file management and platform reliability.
• Fleet-Friendly Workflow – Supports multi-user access and remote log sharing for fleet management.

Benefits

• Reduced downtime with remote troubleshooting and tune delivery
• Cleaner setup—no laptop required for day-to-day file management
• Simplified communication between driver, shop, and technician
• Quick access to data logs for faster diagnosis and support

Installation & Important Notes

• Connect the Auto Agent 3 to the OBD2 port.
• Install the EZ LYNK app and pair the device via Wi-Fi.
• Internet access is required for cloud-based file transfers and updates.
• PTO-equipped vehicles are not supported.
• For 2017–2018 L5P trucks, an E41 unlock service or unlocked ECM is required prior to tuning.
• Verify engine code and configuration before ordering.