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Small black rectangular plastic module with wire harness connectors and a Micro-B USB port

Axxess Technologies

Axxess Technologies AXDIS-GMLN29 Radio Replacement Data Interface

SKU CH-JEWW-SY355

Retains steering wheel controls, OnStar, chimes, backup camera, rear entertainment, satellite radio and AUX-IN while adding 12-volt 10-amp accessory power, R.A.P.

  • TypeWire Harness
  • Retains OnStar and OEM Bluetooth for hands-free calls
  • Keeps steering-wheel audio controls working after radio swap
  • Supplies 12-volt 10-amp accessory power for aftermarket head unit
  • Provides NAV outputs including speed sense and reverse trigger
  • Retains factory backup camera and rear seat entertainment systems

Radio Replacement Data Interface

The Axxess AXDIS-GMLN29 is a wire harness that lets you install an aftermarket radio in select GM vehicles from 2006 onward. It supplies accessory power and preserves factory functions so the new head unit works with the car’s existing systems.

Installation and Common Issues

The harness plugs between the vehicle wiring and the new radio, so no cutting or splicing of the factory loom is required. The main difficulty is routing the NAV output wires for parking brake, reverse, mute and speed sense if the aftermarket unit needs them. A Micro-B USB port allows firmware updates should a vehicle-specific issue arise.

Retained Features and Limits

The interface keeps OnStar and OEM Bluetooth with adjustable OnStar volume, retains chimes, steering-wheel audio controls, factory AUX-IN, backup camera, rear-seat entertainment and satellite radio. It provides a 12-volt 10-amp accessory feed and R.A.P. retention. Vehicles outside the 2006-Up GM application list are not supported.

Highlights

  • Retains OnStar and OEM Bluetooth for hands-free calls
  • Keeps steering-wheel audio controls working after radio swap
  • Supplies 12-volt 10-amp accessory power for aftermarket head unit
  • Provides NAV outputs including speed sense and reverse trigger
  • Retains factory backup camera and rear seat entertainment systems

Specifications

TypeWire Harness

Questions about this item

How do I verify the 12-volt 10-amp accessory power is active after installing the AXDIS-GMLN29?

Turn the ignition on and measure voltage at the accessory wire with a multimeter; it should read 12 volts. Confirm retained accessory power stays on after key removal until a door opens.

What comes in the box with the AXDIS-GMLN29 and what must I source separately?

The interface module and its vehicle-specific harness are included. You must supply the aftermarket radio, any dash kit, antenna adapter and tools required for your 2006-up GM vehicle.

Which version of the AXDIS-GMLN29 should I choose for my GM vehicle?

The AXDIS-GMLN29 is a single part number covering select 2006-up GM vehicles; match it to your specific year, make and model using the application guide before ordering.

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