Metra AXDIS-GMLN29 Data Interface with SWC GM 2006-2023

The Metra AXDIS-GMLN29 Data Interface with Steering Wheel Control is a vehicle-specific integration module engineered for select General Motors vehicles from 2006 through 2023. This interface supplies regulated accessory power and essential vehicle data signals required for proper aftermarket head unit installation while retaining key OEM features. Integrated steering wheel control retention allows continued use of factory audio buttons, and the module supports Retained Accessory Power (R.A.P.), warning chimes, balance/fade control, and navigation-related outputs. Designed for professional installers, the AXDIS-GMLN29 ensures a seamless OEM-to-aftermarket transition that preserves vehicle functionality and driver convenience.

KEY BENEFITS

• Supplies a stable 12 V accessory power output required for aftermarket head unit operation
• Retains factory steering wheel audio controls for seamless button functionality
• Preserves Retained Accessory Power (R.A.P.) behavior after radio replacement
• Maintains balance and fade control through the factory audio system
• Retains warning chimes and other vehicle audio cues
• Provides navigation-related outputs including parking brake, reverse, and speed sense signals
• Vehicle-specific design reduces wiring complexity and installation time
• Ideal for professional installations requiring OEM feature retention

TECHNICAL SPECIFICATIONS

• Weight: N/A
• Dimensions: N/A
• Application: Select GM vehicles 2006–2023
• Function: Data interface with steering wheel control retention
• Accessory Power Output: 12 V DC, regulated
• Retained Functions: Steering wheel controls, Retained Accessory Power, warning chimes, balance/fade
• Navigation Outputs: Parking brake, reverse sense, vehicle speed sense
• Steering Wheel Control Support: Yes (compatible with aftermarket SWC protocols)
• Compatibility: Works with compatible aftermarket head units
• Housing: Black interface module with vehicle-specific harness

INSTALLATION & COMPATIBILITY

The AXDIS-GMLN29 installs inline between the aftermarket head unit and the factory wiring harness in compatible GM vehicles from 2006 to 2023. It provides the accessory power and vehicle data signals required for proper radio operation while retaining steering wheel control functions and other OEM system behaviors. The module supports both amplified and non-amplified audio configurations, but installers should verify specific vehicle model compatibility and available dash space prior to installation. This interface is intended for professional installations where preserving OEM convenience and control features is required.

FAQS

• What does the AXDIS-GMLN29 interface do?
  AXDIS-GMLN29 allows aftermarket radios to be installed in select GM vehicles while maintaining data-driven features like retained accessory power and warning chimes.
• Which GM vehicles use AXDIS-GMLN29?
  It supports specific GM platforms and model years. Always confirm vehicle compatibility to ensure proper functionality and system integration.
• How does AXDIS-GMLN29 improve audio system upgrades?
  By handling data communication correctly, it prevents power issues and provides a stable base for adding amplifiers or upgraded speakers.
• Is AXDIS-GMLN29 compatible with most aftermarket radios?
  Yes, it works with major radio brands when installed properly, making it a flexible solution for GM radio replacements.