About the CRUX ONST-11C Wiring Interface
Product highlights:
- install a new receiver in select 2004-10 GM vehicles with 11-bit LAN systems
- retains factory steering wheel controls, Bose amplifier and sub, OnStar, and chime functions
- works with factory amplified and non-amplified systems
- provides outputs (parking brake, reverse, Vehicle Speed Sense [VSS]) for navigation receivers
- module dimensions: 5.3"W x 1.3"H x 3.4"D
- warranty: 1 year
- MFR # ONST-11C
- Item # 249ONST11C
- California customers: Please click here for your Proposition 65 WARNING.
What's in the box:
CRUX ONST-11C Wiring Interface owner's manual
If you need assistance accessing this owner's manual, please give us a call.- Radio replacement interface module
- Wiring harness
- SWC harness
- Installation Instructions
More details on the CRUX ONST-11C Wiring Interface
Researched by Crutchfield's Stacey B.
The CRUX ONST-11C Wiring Interface replaces these items:
Product Research
Features
Vehicle Compatibility: The CRUX ONST-11C allows replacement of the factory radio with an aftermarket head unit while retaining important factory features in select 2005-2009 General Motors (GM) vehicles with 11-bit LAN systems.
| Make | Model | Year |
|---|---|---|
| Chevrolet | Cobalt | 2005-2006 |
| Malibu | 2004-2007 | |
| Pontiac | G6 | 2005-2009 |
Note: If your 2009 Pontiac G6 has one volume knob in the center of the factory radio, then use the CRUX ONST-11B radio replacement interface instead.
Retained Factory Features: The CRUX ONST-11C retains important factory features such as OnStar with Bluetooth hands-free communication, factory amplifier, steering wheel controls, RAP, and warning chimes.
- OnStar System: The ONST-11C will retain the factory OnStar system for emergency communication
- Factory Amplifier: The CRUX ONST-11C retains the factory Bose amplifier and sub with fader control. It also works with non-amplified audio systems.
- Steering Wheel Controls: Your factory steering wheel controls will be retained when installing the ONST1-11C radio replacement interface module (aftermarket radio must also support steering wheel controls). Make sure you connect your radio via the appropriate SWC connector (either blue/yellow wire or 3.5mm jack) and set the dip-switching according to the installation instructions.
- Warning Chimes: The CRUX ONST-11C allows you to retain all of your vehicle's factory warning chimes with adjustable volume.
Navigation Outputs: To make installation of aftermarket DVD, digital multimedia, and navigation receivers simple and less time consuming the CRUX ONST-11C contains Parking Brake, VSS (Vehicle Speed Sensor), and Reverse Gear outputs.
The CRUX ONST-11C Wiring Interface replaces these items:
PAC OS-311B Wiring Interface
Connect a new car stereo and retain OnStar®, RAP, and safety warning chimes in select 2004-up Chevrolet and Pontiac vehicles
- lets you replace the radio in select 2004-up GM vehicles while maintaining operation of the OnStar® system and retaining warning chimes
- supports RAP (Retained Accessory Power)
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Customer Q&A
3 questions already asked
Q
I have a 2009 Pontiac G6 GT with the monsoon audio system with two factory subs and factory monsoon amp should I plug the wiring interface into the non-Bose or Bose spot on the steering wheel control interface?
logan May 15, 2025
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website.
If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer.
red May 15, 2025 (Staff)
Q
I have a 06 Cobalt (no on-star no factory sub). Will this work on my car and allow me to retain my steering wheel controls and vehicle display center?
luther Jul 14, 2024
1 answer
A
Greetings Luther. Thank you for your question. This harness retains the driver information center, and with compatible stereo, will retain the factory steering wheel radio controls on your 2006 Cobalt.
thomas Jul 15, 2024 (Staff)
Q
I have a 2005 Pontiac G6 and I installed a Boss radio with this module. I set the correct dip switch settings per the instructions and the volume steering wheel buttons work correctly however the mute and source buttons work as next track and previous track buttons. No other buttons work. I have also tried changing the internal voltage switch from 3.3 volts to 5 volts to no avail. How do I fix this? Thanks
chelsea Jul 05, 2024
1 answer
A
I would be happy to help, Joshua. Try selecting the dip switch settings for "Pioneer" on the CRUX ONST-11C wiring interface when using the Boss BE7ACP. We show this is needed when using some steering wheel control interfaces with the Boss BE7ACP radio. I hope this helps!
bo Jul 05, 2024 (Staff)
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Worked perfectly in a Pontiac G6. All of the factory chimes work again. The steering wheel controls work as well.
Mark from Taylorsville, KY