Metra WM-GM29-SWC GM LAN Data Interface with SWC
Installation Instructions for 2006 and Newer GM Vehicles
*For non-amplified models, or models with an analog activated amplifier
Interface Features
- ✔️ Provides accessory power (12-volt 10-amp)
- ✔️ Retains R.A.P. (retained accessory power)
- ✔️ Provides wires for multimedia radios (parking brake, reverse, speed sense)
- ✔️ Retains chimes
- ✔️ Retains audio controls on the steering wheel
- ✔️ Retains balance and fade
- ✔️ Micro-B USB updatable
Connections to Aftermarket Radio
From the WM-GM29-SWC harness to the aftermarket radio, connect the:
- Black wire to the ground wire.
- Yellow wire to the battery wire.
- Red wire to the accessory wire.
- Blue wire to the power antenna wire (LD-GM29A only).
- Blue/White wire to the amp turn-on wire.
- Orange wire to the illumination wire (if applicable).
Note: LD-GM29B harness has (3) Orange wires.
Speaker Outputs:
- Gray wire to the front right positive speaker output.
- Gray/Black wire to the front right negative speaker output.
- White wire to the front left positive speaker output.
- White/Black wire to the front left negative speaker output.
- Purple wire to the rear right positive speaker output.
- Purple/Black wire to the rear right negative speaker output.
- Green wire to the rear left positive speaker output.
- Green/Black wire to the rear left negative speaker output.
Other Connections:
- Blue/Pink wire to the VSS/speed sense wire.
- Green/Purple wire to the reverse wire.
- Light Green wire to the parking brake wire.
SWC Connections (CONT.)
Connect the 3.5mm jack to the SWC input. For radios with a wire for SWC, use the 3.5mm adapter provided.
Refer to the manual provided with the radio for the following connections:
- Boss (with SWC wire): Key 1 (Gray) - Brown
- Kenwood / JVC (with SWC wire): Blue/Yellow - Brown
- XITE: SWC-2 - Brown
- Universal Radio: Key-A or SWC-1 - Brown / Key-B or SWC-2 - Brown/White
+ After programming, assign SWC buttons within radio menu.
Diagram Description: A diagram shows the WM-GM29-SWC layout with connections for vehicle connectors, interface module, and radio connections. It also illustrates a 3.5mm jack.
Programming
- Open the driver's door, and keep open during the programming process.
- Cycle the ignition on.
- Connect the WM-GM29-SWC harness into the WM-GM29-SWC interface, and then to the wiring harness in the vehicle.
- Tap the Volume Up button on the steering wheel until the LED stops flashing.
- The LED will flash Green & Red while the interface programs the radio to the steering wheel controls. Once the radio is programmed, the LED will go out, flash, then turn solid Green.
- The LED will once again go out, then quickly flash Green & Red while the interface programs itself to the vehicle. Once programmed, the LED will go out again, then turn solid Green.
- Cycle the ignition off, then back on. Test all functions of the installation for proper operation.
- If the interface fails to function, press and release the reset button, then repeat the programming process from step 4.
Applications
This interface is compatible with a wide range of vehicles. Below is a list of compatible models and years.
LD-GM29A 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
- 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
LD-GM29B Applications:
Chevrolet
- Cobalt: 2007-2010
- HHR: 2006-2011
- Malibu: 2008-2012
Pontiac
- G5: 2007-2009
- G6 (5th digit of VIN must be a J, K or L): 2009
- G6: 2010
- Solstice: 2006-2009
Saturn
- Aura: 2007-2009
- Sky: 2007-2009
Technical Support
Having difficulties? We're here to help.
Contact our Tech Support line at: 386-257-1187
Or via email at: techsupport@metra-autosound.com
Tech Support Hours (Eastern Standard Time):
- Monday - Friday: 9:00 AM – 7:00 PM
- Saturday: 10:00 AM – 7:00 PM
- Sunday: 10:00 AM – 4:00 PM
