Metra - AXTC-LN31 - Data Interface with SWC - Fits Select GMC Models 2017-2023

The Metra AXTC-LN31 Data Interface with Steering Wheel Control retention is a vehicle-specific integration module engineered for select GMC models from 2017 to 2023. This interface enables seamless installation of an aftermarket head unit while retaining critical factory features, including steering wheel audio controls, accessory power, and data-driven vehicle signals. Designed to communicate directly with the vehicle’s data network, the AXTC-LN31 eliminates the need for hardwired analog connections and additional adapters. It is intended for professional installers and advanced enthusiasts who require a clean, reliable OEM-to-aftermarket integration without sacrificing factory functionality.

KEY BENEFITS

• Retains factory steering wheel audio controls with compatible aftermarket head units
• Generates a data-based accessory and ignition signal required for aftermarket radio installation
• Maintains proper vehicle communication without cutting or modifying factory wiring
• Vehicle-specific programming reduces installation time and configuration errors
• Supports both analog and data SWC inputs depending on radio compatibility
• Provides reliable integration for factory audio and infotainment systems
• Designed to preserve OEM system behavior and driver controls
• Ideal for professional installations in late-model GMC vehicles

TECHNICAL SPECIFICATIONS

• Weight: 1.00 lb
• Dimensions: 8.00″ L × 4.00″ W × 3.00″ H
• Application: Select GMC vehicles 2017–2023
• Function: Data interface with steering wheel control retention
• Steering Wheel Control Support: Yes
• Accessory / Ignition Output: Data-generated
• Radio Connections: Aftermarket head units with SWC capability
• Vehicle Interface: Data network integration
• Housing: Black interface module with vehicle-specific harness

INSTALLATION & COMPATIBILITY

The AXTC-LN31 installs inline between the factory wiring harness and an aftermarket head unit in compatible 2017–2023 GMC vehicles. It is designed to retain steering wheel audio controls and provide the necessary data-based power and signal outputs required for proper radio operation. This interface works best with aftermarket radios that support steering wheel control input via wired or data protocols. Adequate space behind the dash should be confirmed prior to installation, and additional radio-specific adapters may be required depending on the head unit brand.

FAQS

• What does the AXTC-LN31 control interface do?
  AXTC-LN31 is a steering wheel control interface that allows factory buttons to control aftermarket radios. It ensures safe driving by keeping volume and track controls at your fingertips.
• Which aftermarket radios work with AXTC-LN31?
  AXTC-LN31 supports most major radio brands when paired with the correct patch lead. Compatibility should be verified to ensure proper communication and button mapping.
• Why is AXTC-LN31 better than universal steering control adapters?
  It’s vehicle-specific, offering faster response and more accurate button retention. This reduces programming issues and provides a more factory-like user experience.
• Is professional installation required for AXTC-LN31?
  While experienced DIY installers can handle it, steering control wiring can be complex. Professional installation ensures correct programming and long-term reliability.