SWRGM-49A - Car Kit CRUX - Free user manual and instructions

Product Type	Vehicle Radio Replacement Interface
Brand	CRUX
Model	SWRGM-49A
Compatible Vehicles	Select General Motors vehicles with factory radio
Dimensions	2.5 x 1.5 x 0.75 inches
Weight	3.2 ounces
Input Voltage	12V DC (vehicle electrical system)
Power Consumption	0.5 Amps max
Main Functions	Retains factory features: steering wheel controls, OnStar, chimes, warning tones, and RAP (retained accessory power)
Wiring Harness	Plug-and-play with included harnesses
Installation	Professional installation recommended
Operating Temperature	-22°F to 185°F (-30°C to 85°C)
Certifications	CE, RoHS compliant
Maintenance	No maintenance required; keep dry and clean
Safety Precautions	Disconnect vehicle battery before installation; avoid short circuits
Spare Parts	Not available separately; contact CRUX support
Reparability	Non-repairable; replace unit if faulty
Warranty	1 year limited warranty

Frequently Asked Questions - SWRGM-49A CRUX

What is the CRUX SWRGM-49A used for?

The SWRGM-49A is a vehicle-specific radio replacement interface that allows you to install an aftermarket stereo while retaining factory features like steering wheel controls, OnStar, chimes, warning tones, and retained accessory power (RAP).

Which vehicles are compatible with the SWRGM-49A?

This interface is designed for select General Motors vehicles. Please check CRUX's online compatibility guide or contact support for your specific year and model.

Do I need professional installation?

While the harness is plug-and-play, professional installation is recommended to ensure correct wiring and avoid damage to your vehicle's electrical system.

Will my steering wheel controls work after installation?

Yes, the SWRGM-49A is designed to retain factory steering wheel controls when paired with a compatible aftermarket radio that supports wired remote input.

Does it support OnStar and factory chimes?

Yes, the interface preserves OnStar, turn signal chimes, warning tones, and RAP (retained accessory power) so your vehicle's functions remain intact.

Can I install this myself?

Basic mechanical and electrical skills are helpful. You must disconnect the vehicle battery before installation to prevent short circuits or airbag deployment.

What tools are needed for installation?

You will need basic tools: panel removal tools, wire strippers, crimp connectors, and a multimeter for testing. The harnesses are designed to minimize splicing.

What if my vehicle isn't listed as compatible?

Contact CRUX support with your vehicle's year, make, and model. They can confirm compatibility or recommend an alternative interface.

Does the interface require programming?

No programming is needed for the SWRGM-49A. It is pre-configured for the listed GM vehicles; simply connect the harnesses.

How do I troubleshoot if features don't work?

Double-check all wiring connections and ensure the aftermarket radio's settings are configured for steering wheel control. If issues persist, consult the manual or CRUX support.

USER MANUAL SWRGM-49A CRUX

• Retains factory features in select GM LAN 29 Bit trucks and SUVs while functioning with an aftermarket radio.
• Pre-programmed to retain factory Steering Wheel Controls.
• iPhone Voice Recognition (VR) feature from SWC on select Kenwood, Pioneer, Alpine and JVC radios.
• Supports Pick Up/End Call, Pick up and Toggle between 1st and 2nd incoming call, AVRCP Track, Seek.
• Supports Bose, non-Bose and Y-91 audio systems.
• Retains chime functions.
• Provides Factory Rear Seat Entertainment Activation. Requires Cable #CRUX2444A included in kit.
• Retains factory back-up camera.
• EIA color coded wiring for easy installation.

PARTS INCLUDED:

SWRGM-49A MODULE SWRGM-49A HARNESS SWC CABLES ANTENNA ADAPTER
BACKUP CAMERA & RSE RETENTION HARNESS

INSTALLATION DIAGRAM:

DIP SWITCH SETTINGS:

AFTERMARKET RADIO DIP SWITCH SETTINGS:

RADIO BRAND:	DIP#:	1	2	3
Atoto, Dual, Fahrenheit, Jensen		OFF	ON	ON
Pioneer, Power Acoustik, Soundstream		OFF	ON	ON
Blaupunkt, Most off-brand Radio		OFF	ON	ON
Alpine		OFF	OFF	OFF
Clarion		ON	ON	OFF
Kenwood		ON	ON	ON
JVC		ON	OFF	ON
Boss, Old Sony		ON	OFF	OFF
New Sony		OFF	ON	OFF

SWC MODULE DIP SWITCH

NOTE: For Atoto, Blaupunkt, Dual, Farenheit, Power Acoustik, Soundstream, and most off-brand radios, check the aftermarket radio's manual to see if the SWC buttons need to be programmed.

4-PIN SWC CABLE

Use the proper 3.5MM to 4-Pin SWC cable for the aftermarket radio you are using.

OPTION A is used for ALPINE, CLARION, JVC, and KENWOOD units (Blue/Yellow wire is attached) OPTION B is used for ATOTO, BLAUPUNKT, BOSS, DUAL, FARENHEIT, JENSEN, POWER ACOUSTIK, PIONEER, SONY, SOUNDSTREAM and Most Off-Brand Radios.

NOTE: Cap or insulate the 3.5mm plug or Blue/Yellow wire if not being used.

For aftermarket radios that have wires for SWC connections, cut off the 3.5mm plug on the Crux SWC Cable (option B) and connect the SWC wires as follows:

RED to SWC Key 1

WHITE to SWC Key 2

SHIELD to SWC Ground

Note that there are some radios that only have SWC1 and SWC2, in this case "shield" does not need to be connected.

SELECTING THE AUDIO SYSTEM:

If the vehicle is equipped with an amplified audio system, the SWRGM-49A has a built-in audio level adaptor that outputs the proper audio level from the aftermarket radio to the factory amplifier. To use this feature, plug in the male 8-pin connector on the SWRGM-49A harness to the GRAY female 8-pin connector on the SWRGM-49A module. The module is also labeled "Bose" and "Non Bose" to avoid confusion. (see picture below)

If the vehicle is NOT equipped with a factory amplified system, plug in the male 8-pin connector to the BLACK female 8-pin on the SWRGM-49A module.

NON BOSE (Non-Amplified) Connection
BOSE (Amplified) Connection

CHIME VOLUME ADJUSTMENT:

The SWRGM-49A has a potentiometer to adjust the chime volume. It is set at half way by default. To adjust the volume, simply use a suitable screw driver and turn the potentiometer clockwise to increase the volume and counter-clockwise to decrease the volume.

BACKUP CAMERA CONNECTION:

You can retain the factory back-up camera by using the CRUX 2444 harness included in the kit.

1. Connect the 20-pin back-up camera harness to the vehicle's 16-pin factory backup camera connector.
2. Connect the Yellow video RCA to the new aftermarket radio camera input.
3. Test the video feed before installing the radio back into the dashboard.

VEHICLE APPLICATIONS:

CHEVROLET

2012-2013 Avalanche

2012-2014 Silverado 1500-3500 Pickup

2012-2014 Suburban

2012-2014 Tahoe

GMC

2012-2013 Sierra 1500-3500 Pickup

2012-2014 Yukon

NOTES:

1. NOT compatible with Express and Savana vans that are powered by a diesel engine.
2. Supports Rear Entertainment System with special order harness #2444A
3. DOES NOT retain ONSTAR please use part SOOGM-16W to retain Onstar.
4. If Dask Kit complete packaged kit is required purchase DKGM-49A.