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AUX-GM3X Aux Input Jack for 2003-12 GM with hideaway XM module (U2K)

Coming soon

Back in stock by: Feb 24, 2023

The AUX-GM3X is sold out. Same functionality can be obtained from our AUX-GM3.

Choose compatible vehicle
XM subscription status
Choose required cable length

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Return Policy

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Shipping Policy

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Payment Methods

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Any 2003-12 GM vehicle with hideaway XM module (U2K) can benefit from this easy-peasy auxiliary input jack!

Many 2003-12 GM truck, cars and SUV's were fitted with RPO U2K (XM package) and free 3 month trial which means the hideaway XM module likely remains in vehicle which is great news if looking to connect and play an audio device. To verify vehicle has required hideaway XM module; Press "BAND" button on AM/FM radio to switch between FM1, FM2, AM, XM1 and XM2; if XM1/2 appears your vehicle supports our AUX-GM3X, but If only FM and AM bands are displayed; this cable, sadly will NOT work.
With the AUX-GM3x installed; users may connect and play portable audio devices (e.g. Smartphone, iPod, MP3 player and more). To install; connect male 16-pin plug to XM module (usually behind glove box, hatch or trunk area), route and secure jack on or near dashboard (4mm or 5/32" shaft) and plug-in audio device. When in the mood for XM (if subscribed), unplug audio cable from jack-- its that simple--- no complicated setup or wiring. If a wireless Bluetooth connection is proffered; purchase our A2D-GM3x instead.
» Vehicle must have hideaway XM module with or without subscription.
» Connect and play iPods, iPhones, MP3 players, Tablet, Smartphones and more
» Smart devices are able to stream from popular music sites, turn-by turn navigation and more
» Retain original look and feel of dashboard components.
» Connects to hideaway XM module (not to radio). Alternately purchase our AUX-GM3 which connect at the AM/FM radio.
[To avoid costly returns, It is important to observe all requirements, warnings and install guide information prior to purchase.]
1. Works in 2003-12 GM Class-II vehicles listed in drop-down with hideaway XM module (subscribed or not subscribed)
2. Connects to 16-pin plug at the hideaway XM module (Does not fit AM/FM radio). Click installation guide for possible XM module location.
3. Subscription not required but vehicle must have hideaway XM module Will not work without it.
4. If subscribed; select "Subscribed"; not subscribed; select "Not subscribed". If NOT currently subscribed but plan to at a later date; select "Subscribed". Vehicle must have hideaway XM module regardless of subscription status.
5. Available in 4 (default), 6, 8, 10 and 15 ft. lengths. Measure distance between hideaway XM module and potential jack location. Select cable length from drop-down.
» 16-pin main harness (4-15 ft.) x 1
» AUX jack with 4mm or 5/32" shaft
» Free 3.5mm male-male audio cable (3 ft. long) x1

Avoid costly returns. Prior to ordering; please read your INSTALLATION GUIDE which also includes frequently asked questions.

Footnotes: [See drop-down for reference]
* In these vehicles hideaway XM module is at the very rear (trunk/hatch) area and requires 12-15 ft cable.
** Cables longer than 12 ft. are gray (not black)

1. Vehicle MUST HAVE hideaway XM module to be compatible. Subscription is optional. Don't ignore this.
2. Hideaway XM module is a metal box in remote area; not built-into AM/FM radio. Click here for help locating XM module.
3. This cable does not ship same day. It must first be assembled (built) after which it is then shipped using shipping method selected at checkout.

Printed instructions not included in shipment but available here in digital form:
View, print, download Installation instructions

Defective returns:
Our returns policy differs from than of other online merchants and we encourage everyone to read the returns policy page it in its entirety prior to ordering.
Defective returns are 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 our customer with as much product information and applications. Click to read the full return policy page.

Gone are the days when customer had to call or email to obtain shipping rates. At Discount Car Stereo.com, shipping rates are automated and calculated in real time based on cart contents, weight and destination. To get a shipping quote simply add items to cart, follow the checkout link, fill address details and in seconds the online shipping calculator provides real time rates and shipping methods. We ship throughout the USA, Canada and select international destinations (See country drop-down in checkout page for list of international countries or visit our Frequent ask questions page).
Our family owned and operated specialty store makes every effort to get your order processed and shipped at soon as possible; but because 92% of our offerings are custom built, additional time (usually 2-4 working days) is required after which time your order will ship using shipping method selected at checkout. Products requiring assembly includes this assembly logo and a warning message at the end of product description.
Paying for a faster delivery method (e.g. Express mail, Priority mail etc.) for parts requiring "assembly" will not speed up assembly time; however, it does speed up delivery time.
Delivery time for in stock products requiring assembly= Assembly time (2-4 working days) + transit time (your shipping method).
Example: Order our very popular Jaguar Bluetooth A2D-JAG98 module and choose "USPS Priority Mail (2-4 days) shipping. Expect delivery 5-7 business days after order placement.
Please contact us first regarding time sensitive deliveries.
Parts not requiring assembly or customization (off-the-shelf), usually ship within 24 hours.
Tracking information is sent to your email upon labeling. Customers accounts are also updated at the same time. All customers (with or without accounts) can check order status online which has the same details available to our staff.
Except for Priority Mail Express® (Overnight Delivery*), USPS delivery times for Priority Mail® and First-Class Mail® are estimates and are not guaranteed; however these are delivered to most states after 2-7 working days.
International orders require additional paperwork and processing time (3-4 days) prior to shipping.
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, Venmo. 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 once authorization has been 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.

Customer reviews

Average rating:

4.69 (Votes: 54)

Rating of votes (54)

	5			42customers
	4			8customers
	3			3customers
	2			1customers
	1			0customers

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David Manns

Apr 27, 2020, 11:34 PM

This is an awesome harness and easy to install harness on my 2007 Trailblazer LT. It gives you an aux input while keeping the factory head unit and not losing Sirius XM radio. The music is very clear with no static or interface. It also works great when you receive a phone call. Caller can hear very clearly and all sound comes through speakers.