Axxess AX-GMLAN29-SWC User Manual

CAUTION! 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
vehicle is running.
AX-GMLAN29-SWC
INSTALLATION INSTRUCTIONS
AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 1/5/18 INSTAX-GMLAN29-SWC
INTERFACE FEATURES
INTERFACE COMPONENTS
TOOLS REQUIRED
• Wire cutter • Crimp tool • Solder gun • Tape • Connectors (example: butt-connectors, bell caps, etc.) • Small flat-blade screwdriver
TABLE OF CONTENTS
Connections to be made ................................... 3-6
- For models
without an amplifier .......................3
- For models with an analog amplifier ................4
- For models with a digital amplifier ...................5
- 3.5mm jack steering wheel control retention ...6
Installing the AX-GMLAN29-SWC ..........................6
Programming the AX-GMLAN29-SWC ..................7
Adjusting the AX-GMLAN29-SWC ..........................7
Extra features .........................................................8
Steering wheel control settings .......................9-11
- L.E.D. feedback ....................................................9
- Changing radio type ...........................................9
- Remapping the steering wheel control buttons ...10
- Dual assignment instructions (long button press) ...11
Troubleshooting ....................................................12
GM Data Interface with SWC 2006-up*
• Provides accessory power (12-volt 10-amp)
• Retains R.A.P. (retained accessory power)
• Provides NAV outputs (parking brake, reverse, speed sense)
• Retains chimes
• Retains audio controls on the steering wheel
• Retains OnStar / OE Bluetooth
• Adjustable OnStar level
• Retains the factory AUX-IN jack
• Retains the factory backup camera
• Retains RSE (rear seat entertainment)
• Retains SAT (satellite radio)
• Can be used in non-amplified, or analog/digital amplified models
• Retains balance and fade (excluding digital amplified models)
• Includes an antenna adapter
• Micro “B” USB updatable
• AX-GMLAN29-SWC interface • AX-GMLAN29-SWC harness
• 16-pin harness with stripped leads • 4-pin to 4-pin resistor pad harness
• Female 3.5mm connector with stripped leads
• Backup camera harness • RSE harness • Antenna adapter
*Visit AxxessInterfaces.com for up-to-date vehicle specific applications.
APPLICATIONS
See inside front cover

Axxess AX-GMLAN29-SWC Specifications

General

Product Type	Steering Wheel Control Interface
Steering Wheel Control	Yes
Data Bus Type	GMLAN
Radio Replacement	Yes
Wiring Harness Included	Yes
Pre-wired ASWC-1 Harness	Yes
Retained Features	OnStar, Factory Amplifier
Function	Retains steering wheel controls
Interface	GMLAN data bus interface

Summary

Connections to be Made

For models without an amplifier

Details connections for vehicles lacking an amplifier, specifying wire assignments.

For models with an analog amplifier

Details connections for vehicles with an analog factory amplifier, specifying wire assignments.

For models with a digital amplifier

Details connections for vehicles with a digital factory amplifier, specifying wire assignments.

3.5mm Jack Steering Wheel Control Retention

Instructions for retaining steering wheel audio controls using a 3.5mm jack.

Backup Camera and RSE Harness

Instructions for retaining backup camera and rear seat entertainment (RSE) features.

Installing the AX-GMLAN29-SWC

Programming the AX-GMLAN29-SWC

Adjusting the AX-GMLAN29-SWC

Audio Level Adjustment

Procedure to adjust the audio output level for digital amplified models.

Chime Level Adjustment

Procedure to adjust the chime volume level for digital amplified models.

OnStar Level Adjustment

Procedure to adjust the OnStar communication volume level.

Extra Features

AUX-IN, RSE and SAT

Details on retaining AUX-IN, Rear Seat Entertainment, and Satellite Radio features.

Notes When Retaining AUX-IN

Specific notes and limitations for retaining the AUX-IN jack functionality.

Steering Wheel Control Settings

L.E.D. Feedback

Explanation of LED indicator flashes for radio recognition and troubleshooting.

Changing Radio Type

Procedure to manually set the radio type if auto-detection fails.

Remapping Steering Wheel Control Buttons

Guide to reassigning steering wheel control button functions.

Dual Assignment Instructions (Long Button Press)

Instructions for assigning a second function to a single button via long press.

Troubleshooting

Resetting the AX-GMLAN29-SWC

Procedure to reset the interface to its factory default settings.