CRUX CS-GM31L Wiring Interface Owner’s Manual
- June 1, 2024
- CRUX
Table of Contents
CRUX CS-GM31L Wiring Interface
Specifications
- Compatibility: GM LAN V2 (LIN) Bus vehicles 2014-2018
- Features: Retains factory features, chime functions, Steering Wheel Controls, Rear Seat Entertainment activation, backup camera, RAP
- Parts Included: CS-GM31L Module, CS-GM31L Harness, SWC Cable
Installation Instructions
- Connect the aftermarket radio’s power/speaker harness to the CS-GM31L T-Harness using the Installation Diagram provided.
- Remove the radio trim and bezel carefully.
- Unplug the GREEN and GRAY connectors from the head unit.
- Plug the GREEN and GRAY connectors to the CS-GM31L T-Harness.
- Install the antenna adapter between the factory antenna connector and the aftermarket radio antenna port.
- Locate the GREEN/BLACK wire under the steering wheel column and connect it to the SWC Cable.
- Use a dash kit for a clean install and test the radio functionality, chime, and RAP functions.
DIP Switch Settings:
AFTERMARKET RADIO DIP SWITCH SETTINGS:
| RADIO BRAND | DIP# |
|---|---|
| Dual, Fahrenheit, Jensen, Pioneer | OFF OFF ON ON |
| Power Acoustik, Soundstream | OFF OFF ON ON |
| Blaupunkt, Most off-brand Radio | OFF OFF ON ON |
| Alpine |
FAQ
Q: Do I need any additional parts for retaining Factory Rear Seat Entertainment activation?
A: Yes, you will need part#CRUX2333A which is sold separately.
Q: How do I ensure a reliable connection when tapping the GREEN/BLACK wire from the SWC Cable?
A: We recommend soldering the wires together for a reliable connection.
CS-GM31L
Radio Replacement Interface with Steering Wheel Control
Retention for GM LAN v2 (LIN) Bus Vehicles 2014 -2018
PRODUCT FEATURES
- Retains factory features in select GM LAN V2 (LIN) Bus vehicles while functioning with an aftermarket radio.
- Retains chime functions.
- Retains factory Steering Wheel Controls.
- Provides Factory Rear Seat Entertainment activation. Requires part#CRUX2333A (sold separately)
- Retains factory backup camera.
- Retains RAP (Retained Accessory Power).
PARTS INCLUDED
INSTALLATION DIAGRAM
INSTALLATION INSTRUCTIONS
- Connect the aftermarket radio’s power/speaker harness to the CS-GM31L T-Harness using the Installation Diagram on page 1. Use good quality crimp caps or butt splice for a secure connection. Solder and heat shrinking the connections is highly recommended.
- Carefully remove the radio trim with a plastic pry tool and pull outward.
- Remove the radio bezel by removing the
- screws on the corners.
- Unplug the GREEN and GRAY connectors from the headunit.
- Plug the GREEN and GRAY connectors to the CS-GM31L T-Harness.
- Plug in the antenna adapter (sold separately) between the factory antenna connector and the aftermarket radio antenna port.
- Remove plastic trim under the steering wheel column and locate a GREEN/BLACK wire in the bundle. Tap the GREEN/BLACK from the SWC Cable. We recommend soldering the wires together for a reliable connection.
- Use a dash kit (not included) for a clean install. Test the radio for functionality. Test the chime and Retained Accessory Power (RAP) functions. Reverse the process to install the new aftermarket radio.
DIP SWITCH SETTINGS
AFTERMARKET RADIO DIP SWITCH SETTINGS:
NOTE: For 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.
3.5MM SWC CABLE
Plug in the 3.5MM to 4-Pin SWC cable to the SWC module. NOTE: Insulate the Blue/Yellow and Green wires if not being used.
VEHICLE APPLICATIONS
Crux Interfacing Solutions • 21541 Nordhoff St., Unit C, Chatsworth, CA 91311
phone: 818-609-9299 • fax: 818-996-8188 • www.cruxinterfacing.com