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C2R-GM11b Radio Replacement Interface for Select 2004-09 GM

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  • $76.98
Market price: $119.95, you save $42.97
-36%
C2R-GM11b Radio replacement Interface for GM 11-bit
Score: 4.50 (votes: 2)
No reviews.
  • Net weight
    1 lbs
  • Part Number
    C2R-GM11b
Do you want to quickly and easily replace the factory GM LAN Radio?

If so, you need the C2R-GM11b. This device is a plug-n-play Chime and Data-bus Integration Interface that will allow you to replace the GM LAN Radio with an aftermarket radio. The C2R-GM11b is compatible with the select 2004-09 GM LAN 11-pin Radios listed in the pull-down menu below without OnStar® or when OnStar is not serviced or unwanted. The C2R-GM11 interface replicates all factory warning chimes, audible turn signal indicators and provides a data bus generated 12 volt accessory output that acts just as GM’s R.A.P. (Retained Accessory Power) system did prior to radio removal. R.A.P. keeps the radio powered after the key is off, until the driver door is opened or a 10 minute timer ends, whichever comes first. The C2R-GM11b also provides a single wire output for connecting an optional SWI-RC Steering wheel control interface for Alpine, Clarion, Eclipse, JVC, Kenwood, Pioneer, Sony, and many other aftermarket Radios. The SWI-RC retain the convenience of factory steering wheel controls when upgrading the factory radio with an aftermarket radio.
» Enables aftermarket radio installation without retention of the factory radio
» Supplies the appropriate warning tone from it's built-in speaker such as; door ajar, seat belt, low oil pressure, hi-temp, low fuel, etc.
» Safe & Sound Class II circuitry will not disable vehicle data bus even if interface loses power
» Provides +12v switched accessory output. No more searching for switched +12v in fuse box or kick panel
» New radio will operate with the vehicle RAP (Retained Accessory Power) system. The radio stays on for 10 minutes after the key is turned off.
» Will work with or without factory amplified audio system.
[Please read all requirements and warnings below prior to purchasing this part]
1. Compatible with select 2004-09 GM "BOSE Amplified System", "Standard" or " BOSE®" if OnStar® retention is *NOT* required.
2. Recommended for use with aftermarket radio Line-level input of 2-4 Volts.
3. C2R-GM11b does not retain factory XM or Onstar. Replacing the radio means you will *NOT* be able to retain XM.
Click to review Installation Instructions

1. To retain Onstar, use the OS-311 interface instead.
2. To retain steering wheel controls, purchase the SWI-RC aftermarket steering wheel control interface. (sold separately).

DISCLAIMER: Under no circumstances shall the manufacturer or the distributors (Discount Car Stereo) of the C2R-GM11b parts be held liable for consequential damages sustained in connection with the C2R-GM11b. The manufacture and it’s distributors (Discount Car Stereo) will not, nor will they authorize any representative or any other individual to assume obligation or liability in relation to the C2R-GM11b other than its replacement.


Defective returns:
Our returns policy differs from than of other online merchants so we encourage everyone to read the returns policy page it in its entirety prior to ordering.
Defective returns eligible for warranty repair or replacement service:
Within the first 10 days, Discount Car Stereo will replace any defective or damaged part and provide a pre-paid return label (US Customers only). (Pre-paid labels are not issued for other reasons).
After 10 days of receipt, customer covers return shipping cost, however we cover shipping cost to supplier/manufacturer, and also the cost to ship back to you. If original purchase can't be replaced (discontinued etc.), we reserve the right to provide a substitute part of higher or equal value. Any claims for missing parts must be made within 7 days of delivery.
We strive to avoid costly returns by providing as much product description, exceptions, requirements, pictures and application possible. Click to read the full return policy page.


Gone are the days when customer needed to call or email to obtain shipping rates. At Discount Car Stereo.com, shipping rates are automated and calculated in real time and dependent on cart contents, weight and destination.
To determine applicable shipping for items in cart:
- Proceed to checkout.
- If already signed in; select address from address book or if new or wish to remain anonymous; enter shipping address.
- Select from available shipping methods
Online shipping calculator provides real time rates and shipping methods.
We ship throughout the USA, Canada and select international destinations (Click country drop-down in checkout page for current listing or visit our Frequently asked questions page).
We are a family owned and operated specialty car stereo and accessory store and as such every effort is made to get your order processed and shipped at soon as possible; but because 95% of our offerings are made to order (not sitting on shelf collecting dust). Additional time (usually 2-4 working days) is required after which time orders are shipped using shipping method selected at checkout. Products requiring assembly includes this graphic in addition to warning messages at the bottom of product description page.
Paying for a faster delivery method (e.g. Express mail, Priority mail etc.) for products requiring "assembly" does NOT speed up assembly (built by hand) time; however, it does speed up delivery time after shipment.
Delivery time for in stock products requiring assembly= Assembly time (2-4 working days) + transit time (shipping method).

Por ejemplo: Order our very popular AUX-GM3x GM aux cable and select "USPS Priority Mail (2-4 days) nationwide; expect delivery between 5-7 business days after order placement.
Please contact us first regarding time sensitive deliveries.
Items not requiring assembly or customization (off-the-shelf), usually ship within 24-hours and includes this graphic.
Tracking information is emailed upon labeling. Customers accounts are also updated at the same time. All customers (with or without accounts) are able to check order status online which displays the same details available to our staff.
Except for Priority Mail Express® (Overnight Delivery*), USPS delivery times for Priority Mail® and USPS Ground Advantage™ are estimates and are not guaranteed; however ship time to most states is between 2-7 working days.
International orders require additional paperwork and processing time (6-10 days) prior to shipping and due to many factors (custom inspections, carrier changeovers etc. ) we care not able to determine delivery times .
Free shipping (when available); applies to US only

*with a money-back guarantee


USA/Canada: Pay with Visa, MasterCard, American Express, Discover, PayPal: PayPal, PayPal Credit, Gift cards that display Visa, MasterCard, American Express and Discover logos are also accepted.
Customer billing information (first name, last name, billing address, and credit card information) must be entered exactly as it appears on credit card statement otherwise transaction will decline. Once order is placed a pending authorization (not a charge) will appear on your account and removed within 7-10 business days or after being charged and order shipped.
International: Select PayPal to pay with card. International credit cards are NOT accepted unless registered through PayPal. Click here to learn more about PayPal.
All prices are in U.S. dollars. The actual price charged to International customers is subject to the exchange rate applied by PayPal.
Important notice regarding shipping to alternate (non-billing) addresses: Shipping to non-billing address is no longer allowed, unless proof of card ownership is provided. Any and all customers shipping to non-billing address will be contacted by email to provide additional proof.

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