
All accessories, switches, climate
controls panels, and especially air bag indicator
lights must be connected before cycling the
ignition. Also, do not remove the factory radio
with the key in the on position, or while the
I N S TA L L AT I O N I N S T R U C T I O N S
AxxessInterfaces.com © COPYRIGHT 2020 METRA ELECTRONICS CORPORATION REV. 5/4/20 INSTAXDIS-GMLN44
Connections to be made ................................... 3-6
an amplifier .......................3
an analog amplifier ................4
a digital amplifier ...................5
- 3.5mm jack steering wheel control retention ..6
Installing the AXDIS-GMLN44 ................................6
Programming the AXDIS-GMLN44 ........................7
Adjusting the AXDIS-GMLN44 ...............................7
Steering wheel control settings ......................8-10
- L.E.D. feedback ....................................................8
- Changing radio type ...........................................8
- Remapping the steering wheel control buttons ..9
- Dual assignment instructions
(long button press) ............................................10
Troubleshooting ....................................................11
GM Data Interface with SWC 2012-2016
• Provides accessory power
• Retains R.A.P. (retained
• Provides NAV outputs (parking
brake, reverse, speed sense)
• Retains audio controls on the
• Retains OnStar / OE Bluetooth
• Adjustable OnStar level
• Retains the factory AUX-IN jack
Can be used in non-amplified, or
analog/digital amplified models
• Retains balance and fade
(excluding digital amplified
• Micro “B” USB updatable
• AXDIS-GMLN44 interface • AXDIS-GMLN44 harness
• 16-pin harness with stripped leads • 4-pin to 4-pin resistor pad harness
• Female 3.5mm connector with stripped leads
• Wire cutter • Crimp tool • Solder gun • Tape • Connectors (example: butt-connectors, bell caps, etc.) • Small flat-blade screwdriver