Axxess AX-GMLAN29-SWC, AX-GMCL2-SWC Installation 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

2

APPLICATIONS

BUICK

Enclave 2008-2017
Lucerne 2006-2011

CADILLAC

DTS † 2006-2011
Escalade, Escalade ESV & EXT †
2007-2011
SRX † 2007-2009

CHEVROLET

Avalanche *∆ 2007-2013
Captiva Sport 2012-2015

CHEVROLET (CONT)
Equinox 2007-2009
Express ‡ 2008-up
Impala 2006-2013
Impala

Limited

2014-2016
Monte Carlo 2006-2007
Silverado 2500/3500 *∆ 2014
Silverado (new body) *∆ 2007-2013
Suburban **∆ 2007-2014
Tahoe **∆ 2007-2014
Traverse 2009-2017

GMC

Acadia 2007-2016
Acadia

Limited

2017
Savana ‡ 2008-up
Sierra 2500/3500 *∆ 2014
Sierra (new body) *∆ 2007-2013
Yukon / Yukon XL **∆ 2007-2014

HUMMER

H2 † 2008-2009

PONTIAC

Torrent 2007-2009

SATURN

Outlook 2007-2010
Vue 2008-2010

SUZUKI

XL-7 2007-2009

* These vehicles have a digital amp option. Please reference the “Service Parts Identification” sticker located in the glove box for the RPO code Y91. If Y91 is present, then

the vehicle is equipped with a digital amplifier.

** These vehicles have a digital amp option. Please reference the “Service Parts Identification” sticker located in the glove box for the RPO code STZ or Y91. If STZ or Y91 is

present, then the vehicle is equipped with a digital amplifier.
† These vehicles are standard for a digital amplifier.
‡ For 2013-2015 models equipped with NAV use the AX-GMLAN44-SWC.
∆ For 2012-up models equipped with NAV use the AX-GMLAN44-SWC.

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REV. 1/5/2018 INSTAX-GMLAN29-SWC

CONNECTIONS TO BE MADE

Attention! This interface will work with models that are either non-amplified, analog amplified,
or digital amplified. Please follow the instructions carefully for your model vehicle. Failure to
do so will result in either no sound, or low sound. If you are unsure if your vehicle is factory
amplified or not, please contact your local dealership.

For models

without

an amplifier:

From the 16-pin harness with stripped leads to the aftermarket radio:

• Connect the Red wire to the accessory wire.
Note:

If installing an AX-LCD (sold separately), there will be an accessory wire there to

connect as well.

• If the aftermarket radio has an illumination wire, connect the Orange/White wire to it.

• If the aftermarket radio has a mute wire, connect the Brown wire to it. If the mute wire is

not connected, the radio will turn off when OnStar is activated.

• Connect the Gray wire to the right front positive speaker output.

• Connect the Gray/Black wire to the right front negative speaker output.

• Connect the White wire to the left front positive speaker output.

• Connect the White/Black wire to the left front negative speaker output.

The following (3) wires are only for multimedia/navigation radios that require these wires.

• Connect the Blue/Pink wire to the VSS/speed sense wire.

• Connect the Green/Purple wire to the reverse wire.

• Connect the Light Green wire to the parking brake wire

• Tape off and disregard the following (5) wires, they will not be used in this application:

Blue/White, Green, Green/Black, Purple and Purple/Black.

From the AX-GMLAN29-SWC harness to the aftermarket radio:

• Connect the Black wire to the ground wire.

• Connect the Yellow wire to the battery wire.

• Cut off the resistors from the Green, Green/Black, Purple, and Purple/Black wires below the
heat shrink.

• Connect the Green wire to the left rear positive speaker output.

• Connect the Green/Black wire to the left rear negative speaker output.

• Connect the Purple wire to the right rear positive speaker output.

• Connect the Purple/Black wire to the right rear negative speaker output.

• Ensure the (2) 4-pin Molex connectors are connected together.

Note:

The 4-pin to 4-pin resistor pad harness will not be used in this application.

• The Black/Yellow wire is used for OnStar level adjustment for models that do not come
equipped with steering wheel controls. Refer to the OnStar level Adjustment section for
further instructions.

• Connect the Red and White RCA jacks to the audio AUX-IN jacks of the aftermarket radio.

• The DIN jack is to be used with the optional AX-LCD (sold separately).

• Connect the Red wire to the accessory wire.

Note:

The relay attached to the AX-GMLAN29-SWC harness is only for audible turn signal
clicks. No extra steps are required to retain this feature, so leave the relay as-is.

Continue to 3.5mm jack steering wheel control retention

4

The following (3) wires are only for multimedia/navigation radios that require these wires.

• Connect the Blue/Pink wire to the VSS/speed sense wire.

• Connect the Green/Purple wire to the reverse wire.

• Connect the Light Green wire to the parking brake wire

• Tape off and disregard the following (4) wires, they will not be used in this application:

Green, Green/Black, Purple, Purple/Black

From the AX-GMLAN29-SWC harness to the aftermarket radio:

• Connect the Black wire to the ground wire.

• Connect the Yellow wire to the battery wire.

• Connect the Green wire to the left rear positive speaker output.

• Connect the Green/Black wire to the left rear negative speaker output.

• Connect the Purple wire to the right rear positive speaker output.

• Connect the Purple/Black wire to the right rear negative speaker output.

• Disconnect the (2) 4-pin Molex connectors, and then attach the 4-pin to 4-pin resistor pad harness.

• The Black/Yellow wire is used for OnStar level adjustment for models that do not come equipped
with steering wheel controls. Refer to the OnStar level Adjustment section for further instructions.

• Connect the Red and White RCA jacks to the audio AUX-IN jacks of the aftermarket radio.

• The DIN jack is to be used with the optional AX-LCD (sold separately).

• Connect the Red wire to accessory power.

Note:

The relay attached to the AX-GMLAN29-SWC harness is only for audible turn signal

clicks. No extra steps are required to retain this feature, so leave the relay as-is.

Continue to 3.5mm jack steering wheel control retention

Attention! This interface will work with models that are either non-amplified, analog amplified,
or digital amplified. Please follow the instructions carefully for your model vehicle. Failure to
do so will result in either no sound, or low sound. If you are unsure if your vehicle is factory
amplified or not, please contact your local dealership.

For models

with

an analog amplifier:

From the 16-pin harness with stripped leads to the aftermarket radio:

• Connect the Red wire to the accessory wire.

Note:

If installing an AX-LCD (sold separately), there will be an accessory wire there to

connect as well.

• Connect the Blue/White wire to the amp turn on wire. This wire must be connected to hear
sound from the factory amplifier.

• If the aftermarket radio has an illumination wire, connect the Orange/White wire to it.

• If the aftermarket radio has a mute wire, connect the Brown wire to it. If the mute wire is
not connected, the radio will turn off when OnStar is activated.

• Connect the Gray wire to the right front positive speaker output.

• Connect the Gray/Black wire to the right front negative speaker output.

• Connect the White wire to the left front positive speaker output.

• Connect the White/Black wire to the left front negative speaker output.

CONNECTIONS TO BE MADE (CONT)

5

REV. 1/5/2018 INSTAX-GMLAN29-SWC

CONNECTIONS TO BE MADE (CONT)

The following (3) wires are only for multimedia/navigation radios that require these wires.

• Connect the Blue/Pink wire to the VSS/speed sense wire.

• Connect the Green/Purple wire to the reverse wire.

• Connect the Light Green wire to the parking brake wire

From the AX-GMLAN29-SWC harness to the aftermarket radio:

• Connect the Black wire to the ground wire.

• Connect the Yellow wire to the battery wire.

• Ensure the (2) 4-pin Molex connectors are connected together.

Note:

The 4-pin to 4-pin resistor pad harness will not be used in this application.

• The Black/Yellow wire is used for OnStar level adjustment for models that do not come
equipped with steering wheel controls. Refer to the OnStar level Adjustment section for
further instructions.

• Tape off and disregard the following (4) wires, they will not be used in this application:
Green, Green/Black, Purple, Purple/Black.

• Connect the Red and White RCA jacks to the audio AUX-IN jacks of the aftermarket radio.

• The DIN jack is to be used with the optional AX-LCD (sold separately).

• Connect the Red wire to accessory power.

Note:

The relay attached to the AX-GMLAN29-SWC harness is only for audible turn signal clicks.

No extra steps are required to retain this feature, so leave the relay as-is.

Continue to 3.5mm jack steering wheel control retention

Attention! This interface will work with models that are either non-amplified, analog amplified,
or digital amplified. Please follow the instructions carefully for your model vehicle. Failure to
do so will result in either no sound, or low sound. If you are unsure if your vehicle is factory
amplified or not, please contact your local dealership.

For models

with

a digital amplifier:

From the 16-pin harness with stripped leads to the aftermarket radio:

• Connect the Red wire to the accessory wire.
Note:

If installing an AX-LCD (sold separately), there will be an accessory wire there to

connect as well.

• Connect the Blue/White wire to the amp turn on wire. This wire must be connected to hear
sound from the factory amplifier.

• If the aftermarket radio has an illumination wire, connect the Orange/White wire to it.

• If the aftermarket radio has a mute wire, connect the Brown wire to it. If the mute wire is
not connected, the radio will turn off when OnStar is activated.

• Connect the Gray wire to the right front positive speaker output.

• Connect the Gray/Black wire to the right front negative speaker output.

• Connect the White wire to the left front positive speaker output.

• Connect the White/Black wire to the left front negative speaker output.

• Connect the Green wire to the left rear positive speaker output.

• Connect the Green/Black wire to the left rear negative speaker output.

• Connect the Purple wire to the right rear positive speaker output.

• Connect the Purple/Black wire to the right rear negative output.

6

3.5mm jack steering wheel control retention:

• The 3.5mm jack is to be used to retain audio controls on the steering wheel.

• For the radios listed below, connect the included

female 3.5mm connector with stripped leads

onto the male 3.5mm SWC jack from the AX-GMLAN29-SWC harness. Any remaining wires tape
off and disregard.

•

Eclipse: Connect the steering wheel control wire, normally Brown, to the Brown/White
wire of the connector. Then connect the remaining steering wheel control wire, normally
Brown/White, to the Brown wire of the connector

.

•

Metra OE:

Connect the steering wheel control Key 1 wire

(Gray)

to the

Brown

wire.

•

Kenwood or select JVC with a steering wheel control wire:

Connect the

Blue/Yellow

wire

to the

Brown

wire.

Note:

If your Kenwood radio auto detects as a JVC, manually set the radio type to

Kenwood. See the instructions under changing radio type.

•

XITE:

Connect the steering wheel control SWC-2 wire from the radio to the

Brown

wire.

•

Parrot Asteroid Smart or Tablet:

Connect the 3.5mm jack into the AX-SWC-PARROT (sold

separately), and then connect the 4-pin connector from the AX-SWC-PARROT into the radio

.

Note:

The radio must be updated to rev. 2.1.4 or higher software.

•

Universal “2 or 3 wire” radio:

Connect the steering wheel control wire, referred to as Key-A

or SWC-1, to the

Brown

wire of the connector. Then connect the remaining steering wheel

control wire, referred to as Key-B or SWC-2, to the

Brown/White

wire of the connector. If the

radio comes with a third wire for ground, disregard this wire

.

Note:

After the interface has been programmed to the vehicle, refer to the manual
provided with the radio for assigning the SWC buttons. Contact the radio manufacturer
for more information.

• For all other radios: Connect the 3.5mm jack from the AX-GMLAN29-SWC harness into the jack
on the aftermarket radio designated for an external steering wheel control interface. Please
refer to the aftermarket radios manual if in doubt as to where the 3.5mm jack goes to.

CONNECTIONS TO BE MADE (CONT) CONNECTIONS TO BE MADE (CONT)

With the key in the off position:

• Connect the 16-pin harness with stripped leads, and the AX-GMLAN29-SWC harness, into
the interface.

Attention! Do not connect the AX-GMLAN29-SWC harness to the wiring harness in the vehicle just yet.

Attention!

If retaining steering wheel controls, ensure that the jack/wire is connected to the
radio before proceeding. If this step is skipped, the interface will need to be reset for the steering
wheel controls to function.

Backup camera and RSE harness (if applicable):

• If retaining the factory backup camera, connect the Yellow RCA jack to the backup camera

input of the aftermarket radio.

• If retaining the rear seat entertainment system:

• Connect the Black wire with a ring terminal to the chassis of the aftermarket radio.

• From the RCA jacks labeled “FROM REAR A/V INPUT” to the A/V input of the aftermarket radio:

• Connect the Yellow RCA jack to the video in.

• Connect the Red and White RCA jacks to the audio in.

• From the RCA jacks labeled “TO OVERHEAD SCREEN” to the A/V output of the aftermarket radio:

• Connect the Yellow RCA jack to the video out.

• Connect the Red and White RCA jacks to the audio out.

INSTALLING THE AX-GMLAN29-SWC

7

REV. 1/5/2018 INSTAX-GMLAN29-SWC

PROGRAMMING THE AX-GMLAN29-SWC ADJUSTING THE AX-GMLAN29-SWC

For the steps below, the L.E.D. located inside the interface can only be seen while active. The
interface does not need to be opened to see the L.E.D.

• Start the vehicle.

• Connect the AX-GMLAN29-SWC harness to the wiring harness in the vehicle.

• The L.E.D. will initially turn on solid Green, then turn off for a few seconds while it auto
detects the radio installed.

• The L.E.D. will then flash Red up to (18) times indicating which radio is connected to the interface,
and then turn off for a couple of seconds. Pay close attention to how many Red flashes there
are. This will help in troubleshooting, if need be. Refer to the L.E.D. feedback section for more
information.

• After a couple seconds the L.E.D. will turn on solid Red while the interface auto detects
the vehicle. The radio will shut off at this point. This process should take 5 to 30 seconds.

• Once the vehicle has been auto detected by the interface, the L.E.D. will turn on solid
Green, and the radio will come back on, indicating programming was successful.

• Test all functions of the installation for proper operation, before reassembling the dash. If
the interface fails to function, refer to Resetting the AX-GMLAN29-SWC.

Note:

The L.E.D. will turn on solid Green for a moment, and then turn off under normal

operation after the key has been cycled.

Audio level adjustment (digital amplified models only):

• With the vehicle and radio turned on, turn the volume up 3/4 of the way.

• With a small flat-blade screwdriver, adjust the potentiometer clockwise to raise the audio
level; counterclockwise to lower the audio level.

• Once at a desired level, audio level adjustment is complete.

Chime level adjustment (digital amplified models only):

• With the vehicle on, turn it off and leave the keys in ignition. Open the driver’s door; chimes
will be heard.

• Wait 10 seconds, and then with a small screwdriver, turn the potentiometer clockwise to
raise the chime level; counterclockwise to lower the chime level.

• When the chime is at a desired level, remove the keys from the ignition. This will lock the
chime volume at its current level.

OnStar Level Adjustment

• Press the OnStar button to activate it.

• While OnStar is speaking, press the VOLUME UP or VOLUME DOWN button on the steering
wheel to raise or lower the OnStar level.

• If the vehicle does not come equipped with steering wheel controls, locate the Black/Yellow
wire on the AX-GMLAN29-SWC harness.

• While OnStar is speaking, tap the Black/Yellow wire to ground. Once the OnStar level is set,
it will stay at that level until the Black/Yellow wire is tapped to ground again.

8

AUX-IN, RSE and SAT:

• If the vehicle is equipped with AUX-IN, rear seat entertainment, or satellite radio, the AX­GMLAN29-SWC can retain these features.

Notes when retaining AUX-IN:

• The AUX-IN jack can only be used if it is a stand-alone AUX-IN jack.

• If the vehicle comes equipped with an AUX-IN jack and a USB port, neither can be

retained.

• Change the source of the radio to AUX-IN; satellite radio will start playing.

• The display in the driver’s information center, or the optional AX-LCD (sold separately) will
display the satellite radio information.

• Listed below are the functions of the AX-LCD while using satellite radio:

• Arrow up—Channel up

• Arrow down—Channel down

• Enter—Selects current item on the screen

• Return/ESC—Exits to the previous screen

• To access advanced features of the satellite radio, press and hold the SOURCE button on the
steering wheel for 3 seconds.

Note:

If the vehicle is not equipped with steering wheel controls, the AXLCD will be required

for this feature.

• Listed below are the functions of the steering wheel control buttons while accessing the
advanced features:

• SEEK UP – Scrolls menu up.

• SEEK DOWN – Scrolls menu down.

• VOLUME UP- Enter

• Listed below are the advanced menu options:

• Show Text - Exits menu.

• Set Tuning Mode - Allows the user to select tuning by either a preset, or a channel.

• Set Preset – Allows the user to program presets.

• Set Display - Allows the user to choose which satellite radio information should be

displayed.

Note:

If using the AX-LCD, SEEK UP controls the top line on the display; SEEK DOWN the

bottom line.

• Set Satellite Radio Text Mode - Allows the user to set the display length of the satellite

radio information. Options are; On, Off, or 5 seconds (default is 5 seconds).

• To access AUX-IN or rear seat entertainment, press and hold the SOURCE button on the
steering wheel for 2 seconds. This will switch to the next source available. Each time the
SOURCE button is pressed for 2 seconds, the source will change. The sequence of sources
are SAT/RSE/AUX-IN. The driver’s information center, or the AX-LCD, will provide a visual
confirmation of which source is active.

EXTRA FEATURES

9

REV. 1/5/2018 INSTAX-GMLAN29-SWC

STEERING WHEEL CONTROL SETTINGS

L.E.D. feedback

The (18) Red L.E.D. flashes represent what brand radio the AX-GMLAN29-SWC believes it is
connected to. Each flash represents a different radio manufacturer. For example, if you are
installing a JVC radio, the AX-GMLAN29-SWC will flash (5) times. Following is a legend that
dictates which manufacturer corresponds to which flash.

L.E.D. feedback legend

* Note:

If the AX-GMLAN29-SWC flashes Red (7) times, and you do not have an Alpine radio
connected to it, that means the AX-GMLAN29-SWC does not detect a radio connected it. Verify
that the 3.5mm jack is connected to the correct steering wheel jack/wire in the radio.

** Note:

Part number AX-SWC-PARROT is required (sold separately). Also, the Parrot radio must be

updated to rev. 2.1.4 or higher through www.parrot.com.

† Note:

If you have a Clarion radio and the steering wheel controls do not work, change the radio
type to the other Clarion radio type; same for Eclipse. The following section explains how to do this.

‡ Note:

If you have a Kenwood radio and the L.E.D. feedback comes back as showing as a JVC radio,
change the radio type to a Kenwood. The following section explains how to do this.

1 flash - Eclipse (Type 1) †
2 flashes - Kenwood ‡
3 flashes - Clarion (Type 1) †
4 flashes - Sony / Dual
5 flashes - JVC
6

flashes -

Pioneer / Jensen
7 flashes - Alpine *
8 flashes - Visteon
9 flashes - Valor

10 flashes - Clarion (Type 2) †
11 flashes - Metra OE
12 flashes - Eclipse (Type 2) †
13 flashes - LG
14 flashes - Parrot **
15 flashes - XITE
16 flashes - Philips
17 flashes - TBD
18 flashes - JBL

Continued on the next page

Changing radio type

If the LED flashes do not match the radio you have connected, you must manually program
the AX-GMLAN29-SWC to tell it what radio it is connected to.

1. After (3) seconds of turning the key on, press and hold the Volume-Down button on the
steering wheel until the L.E.D. in the AX-GMLAN29-SWC goes solid.

2. Release the Volume-Down button; the L.E.D. will go out indicating we are now in Changing
Radio Type mode.

3. Refer to the Radio Legend to know which radio number you would like to have
programmed.

4. Press and hold the Volume-Up button until the L.E.D. goes solid, and then release. Repeat
this step for the desired radio number you have selected.

5. Once the desired radio number has been selected, press and hold the Volume-Down button
on the steering wheel until the L.E.D. goes solid. The L.E.D. will remain on for about (3)
seconds while it stores the new radio information.

6. Once the L.E.D. goes off, the Changing Radio Type mode will then end. You can now test the
steering control wheel controls.

Note:

If at any time the user fails to press any button for a period longer than (10) seconds,

this process will abort.

Attention:

The Axxess Updater App can also be used to program the following (3) sub-sections as

well, pending that the interface has been initialized and programmed.

10

Continued on the next page

Radio legend

1. Eclipse (Type 1)

2. Kenwood

3. Clarion (Type 1)

4. Sony/Dual

5. JVC

6. Pioneer/Jensen

7. Alpine

8. Visteon

9. Valor

10. Clarion (Type 2)

11. Metra OE

12. Eclipse (Type 2)

13. LG

14. Parrot

15. XITE

16. Philips

17. TBD

18. JBL

Remapping the steering wheel control buttons

Let’s say you have AX-GMLAN29-SWC initialized and you want to change the button
assignment for the steering wheel control buttons. For example, you would like Seek-Up to
become Mute. Follow the steps below to remap the steering wheel control buttons:

1. Ensure the AX-GMLAN29-SWC is visible so you can see the L.E.D. flashes to confirm button
recognition.

Tip:

Turning the radio off is recommended.

2. Within the first twenty seconds of turning the ignition on, press and hold the Volume-Up
button on the steering wheel until the L.E.D. goes solid.

3. Release the Volume-Up button, the L.E.D. will then go out; The Volume-Up button has now
been programmed.

4. Follow the list in the Button Assignment Legend to reference the order in which the steering
wheel control buttons need to be programmed.

Note:

If the next function on the list is not on the steering wheel, press the Volume-Up
button for (1) second until the L.E.D. comes on, and then release the Volume-Up button. This
will tell the AX-GMLAN29-SWC that this function is not available and it will move on to the
next function.

5. To complete the remapping process, press and hold the Volume-Up button on the steering
wheel until the L.E.D. in the AX-GMLAN29-SWC goes out.

1. Volume-Up

2. Volume-Down

3. Seek-Up/Next

4. Seek-Down/Prev

5. Source/Mode

6. Mute

7. Preset-Up

8. Preset-Down

9. Power

10. Band

11. Play/Enter

12. PTT (Push to Talk) *

13. On-Hook *

14. Off-Hook *

15. Fan-Up *

16. Fan-Down *

17. Temp-Up *

18. Temp-Down *

Button assignment legend

Note:

Not all radios will have all of these commands. Please refer to the manual provided with the

radio, or contact the radio manufacturer for specific commands recognized by that particular radio.

* Not applicable in this application

STEERING WHEEL CONTROL SETTINGS

(CONT)

11

REV. 1/5/2018 INSTAX-GMLAN29-SWC

Dual assignment instructions (long button press)

The AX-GMLAN29-SWC has the capability to assign (2) functions to a single button, except
Volume-Up and Volume-Down. Follow the steps below to program the button(s) to your liking

.

Note: Seek-Up and Seek-Down come pre-programmed as Preset-Up and Preset-Down

for a long button press.

1. Turn on the ignition but do not start the vehicle.

2. Press and hold down the steering wheel control button that you want to assign a long press

function to for about (10) seconds, or until the L.E.D. flashes rapidly. At this point release the
button; the L.E.D. will then go solid.

3.

Press and release the Volume-Up button the number of times corresponding to the new button
number selected. Refer to the Dual Assignment Legend. The L.E.D. will flash rapidly while the
Volume-Up button is being pressed, and then go back to a solid L.E.D. once released. Go to the
next step once the Volume-Up button has been pressed the desired number of times.

Caution:

If more than (10) seconds elapses between pressing the Volume-Up button, this

procedure will abort, and the L.E.D. will go out.

4. To store the long press button in memory, press the button that you assigned a long press
button to (the button held down in Step 2). The L.E.D. will now go off indicating the new
information has been stored.

Note:

These steps must be repeated for each button you would like to assign a dual
purpose feature to. To reset a button back to its default state, repeat Step 1, and then
press the Volume-Down button. The L.E.D. will go out, and the long press mapping for
that button will be erased.

Dual assignment legend

1. Not allowed

2. Not allowed

3. Seek-Up/Next

4. Seek-Down/Prev

5. Mode/Source

6. ATT/Mute

7. Preset-Up

8. Preset-Down

9. Power

10. Band

11. Play/Enter

12. PTT

13. On-Hook

14. Off-Hook

15. Fan-Up *

16. Fan-Down *

17. Temp-Up *

18. Temp-Down *

* Not applicable in this application

STEERING WHEEL CONTROL SETTINGS

(CONT)

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Log onto www.installerinstitute.com or call
800-354-6782 for more information and take steps
toward a better tomorrow.

®

Metra recommends MECP
certified technicians

IMPORTANT
If you are having difficulties with the installation of this product,

please call our Tech Support line at 1-800-253-TECH. Before doing
so, look over the instructions a second time, and make sure the
installation was performed exactly as the instructions are stated.
Please have the vehicle apart and ready to perform troubleshooting
steps before calling.

AxxessInterfaces.com © COPYRIGHT 2018 METRA ELECTRONICS CORPORATION REV. 1/5/18 INSTAX-GMLAN29-SWC

INSTALLATION INSTRUCTIONS

AX-GMLAN29 -SWC

TROUBLESHOOTING

Resetting the AX-GMLAN29-SWC

1. The Blue reset button is located inside the interface, between the two connectors. The button is accessible outside the interface,

no need to open the interface.

2. Press and hold the reset button for two seconds, and then let go to reset the interface.

3. Refer to “Programming the Interface” from this point.