Metra - AXGMLN-09 - Data Interface - Fits Select GM Models 2014-2021

The Metra AXGMLN-09 Data Interface is a vehicle-specific integration module designed for select General Motors vehicles from 2014 through 2021. This interface provides regulated accessory power and necessary vehicle data signals to support aftermarket radio installations in non-amplified factory systems or when the OEM amplifier is bypassed. It also retains key factory functions such as Retained Accessory Power (R.A.P.), warning chimes, and balance/fade control. Built for professional installers, the AXGMLN-09 ensures a clean transition from OEM to aftermarket head units while preserving essential vehicle systems and features.

KEY BENEFITS

• Supplies stable 12 V accessory power output for aftermarket head unit and accessories
• Provides vehicle data signals required for proper radio operation
• Preserves Retained Accessory Power (R.A.P.) behavior after radio replacement
• Maintains factory warning chimes with adjustable output level
• Retains audio balance and fade control through the OEM speaker system
• Supports retention of backup camera and vehicle speed sense signals where applicable
• Pre-wired for optional steering wheel control interface integration
• Reduces installation complexity in non-amplified or OEM amplifier bypass applications

TECHNICAL SPECIFICATIONS

• Weight: 0.61 lb
• Dimensions: 7.50″ L × 4.00″ W × 2.50″ H
• Application: Select GM vehicles 2014–2021
• Function: Vehicle data interface with accessory power and signal outputs
• Accessory Power Output: 12 V DC, 10 A
• Retained Functions: Retained Accessory Power, warning chimes, balance/fade
• Navigation/Vehicle Outputs: Parking brake sense, reverse sense, vehicle speed sense
• Connectivity Retained: OEM Bluetooth and OnStar support (vehicle dependent)
• Backup Camera Support: Yes (vehicle dependent)
• Steering Wheel Control Support: Pre-wired connection (interface sold separately)
• Firmware Updates: Micro USB connection for future updates
• Housing: Black interface module with vehicle-specific harness

INSTALLATION & COMPATIBILITY

The AXGMLN-09 installs between the aftermarket head unit and the factory wiring harness in compatible GM vehicles from 2014 through 2021. It is intended for use with non-amplified factory systems or applications where the factory amplifier is bypassed. The interface provides the required accessory power and data signals while retaining essential OEM features such as OnStar, backup camera, warning chimes, and balance/fade control. Compatibility varies by model and factory equipment; installers should confirm fitment and ensure adequate dash space prior to installation.

FAQS

• What is the AXGMLN-09 data interface used for?
  AXGMLN-09 is designed to install aftermarket radios in select GM vehicles while retaining data-controlled features like accessory power, warning chimes, and factory system communication.
• Why is AXGMLN-09 necessary in modern GM vehicles?
  Many GM vehicles no longer use traditional ignition wiring. AXGMLN-09 translates digital data signals so the aftermarket radio powers on correctly and operates reliably.
• Does AXGMLN-09 retain factory safety and comfort features?
  Yes, it helps maintain warning chimes and other factory alerts, ensuring the vehicle continues to function normally after an aftermarket radio installation.
• Is AXGMLN-09 compatible with most aftermarket radios?
  It works with most major radio brands when installed correctly. Always verify vehicle year and trim compatibility before purchasing for best results.