GMC AUX-GM3x User manual

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AUX-GM3x
QUICK START AUX. INSTALLATION GUIDE FOR GM CLASS-II VEHICLES WITH XM TUNER MODULE
Created August 1, 2015
Revised June 11, 2020

Introduction:
Thousands of GM Cars, Trucks and SUV’s are fitted with an XM Tuner module but
lack an input jack for Smartphone, iPod, MP3 player etc. but here is good news.
See, GM fitted many vehicles with an XM tuner module and the AUX-GM3x cable
uses the XM port to provide a 3.5mm audio input for all kinds of audio devices
including Smartphones, MP3 Players, iPods etc. while also retaining XM playback
(if subscribed). Be mindful the vehicle MUST have an XM tuner module (with
or without subscription) for the AUX-GM3x to work. XM Tuner module is a
small electronic box (See Fig. 1) installed in a remote area of vehicle.
NOTE: XM it NOT built into the AM/FM radio, but located in remote area. See table
at the end of this guide for XM tuner location.
See Frequently Asked question at the end of this guide for more details.
Installation (Does not fit AM/FM radio. Fits XM Tuner module)
Alternately, purchase our AUX-GM3 which connect to radio.
See XM module location chart at the end of this guide for possible
location.
1. Disconnect factory 16-pin plug from Tuner (See Fig. 1)
To disconnect pull back blue locking tab (See Fig. 2), press and hold
black release tab then slide plug from tuner chamber.
At all cost avoid pulling wires!
Fig. 1
diagram
2. Connect factory 16-pin plug (See Fig. 2) to adapter harness 16-pin
connector (See Fig. 3)
Fig. 2
16-pin plug

Fig. 3
16-pin connector
1. Connect adapter harness 16-pin plug (See Fig. 2) to XM module 16-pin
connector (See Fig. 1)
2. Carefully route audio jack (See Fig. 4) to location on dash or nearby
panel where it will be mounted (within 4, 6 or 10 ft.) Location will vary
based on vehicle and customer’s preference.
Aux Jack (active XM)
Aux jack (expired XM)
Fig. 4
Audio jack
3. Optional: Drill a ¼” hole in dash or panel, push threaded end through
hole and secure with nut (See Fig. 5)
Fig. 5
The panel should not be thicker than 1/8” otherwise the
jack threads won’t protrude enough to engage with nut.
(If necessary, use a Dremel or sander to thin panel).
Mounting jack is not necessary but doing so makes for a
stock appearance and convenient way of
connecting/disconnecting audio plug.

Test Operation:
1. Turn ignition and radio “ON”
2. Press “BAND” button until XM1 or XM2 is displayed
3. Connect audio device to 3.5mm jack using included 3 ft. audio cable or
similar (See Fig. 6)
4. Put audio device in play mode and ensure volume is at 80% or higher
Fig. 6
3.5mm Male audio cable
5. Use radio volume control button to set playback level. If distortion is
heard lower volume on audio device.
Playlist and Track selection is *NOT* possible from the
Radio. You must use the audio devices built-in controls
to access audio files.
6. To listen to XM simply disconnect 3.5mm audio cable at the jack and
operate XM as customary
7. If correct operation is confirmed go ahead and reinstall Panels
surrounding the XM tuner.
Alert: Audio plug must be removed from cable (jack must be empty)
otherwise XM playback is impaired.
Frequent asked questions
1. Does the AUX-GM3x work in all GM Class-II vehicles?
YES; so long vehicle has an XM Tuner module with or without subscription.
2. Will I be able to use smartphone speakerphone feature?
Use smartphone speakerphone mode to hear callers voice on car speaker.
This feature is limited by smartphone not this cable.
3. My vehicle does not have an XM Tuner, how can I connect/play my
portable device?
If vehicle does not have XM tuner purchase our PXDXGM3
4. Which cable length should I select from options?
Measure distance between XM module and location where you intend to
place 1/8” audio jack and select from available options.
5. What’s the difference between Expired and Active and which to I
select?
Expired subscription and NO intentions to renew, purchase “Expired”
Expired subscription and intent on renewing at future time, purchase
“Active”
Important: Expired version will not allow XM playback at any time,
therefore to retain XM playback (now or in the future), purchase “Active”
version.
6. I don’t know if vehicle has XM Tuner. How can I find out without ripping
car apart?
Turn radio “ON”, press “BAND” button repeatedly as radio cycles through
AM/FM/XM1/XM2. If only AM/FM is displayed, vehicle does not have
required XM tuner.
7. My factory radio has a “BAND”button but no XM tuner. Will this work?
NO; For the AUX-GM3x to work, vehicle must have an XM tuner module.
8. Do you offer a wireless music streaming option for my GM with XM
Tuner?
YES, See our A2D-GM3x
9. After connecting everything, playback is noisy/humming. Any ideas?
Ensure audio device volume is set to 80% or more. When listening to XM (if
subscribed) ensure jack is empty.

10. Where is the XM Tuner Module?
See Table below for possible XM tuner module location
Make
Model
XM Tuner Location
Buick
Allure
Left Rear Q-Panel
Enclave
Right Rear Q-Panel
LaCrosse
Behind Rear-Left Q-Panel (Trunk)
LeSabre
Left Rear Q-Panel
Lucerne
Left Rear Trunk
Rainier
Above Pass-side dash Panel
Rendezvous
Behind Glovebox
Terraza
Above steering column
Cadillac
CTS
Rear Shelf (Deck) Left Side
DTS
Left-Rear (Trunk)
Deville
Behind Rear Seat/Left Q-Panel
Escalade (EXT/ESV)
Behind Glovebox
SRX
Behind Rear Right Q-Panel
XLR
Between Seats
Chevrolet
Avalanche
Behind Glovebox
Cavalier
Rear Shelf (Deck) center
Colorado
Behind Glovebox
Corvette Coupe
Rear Left Q-Panel (above wheel well)
Corvette Convertible
Between Seats inside hatch cover
Equinox
Left Rear Q-Panel
HHR
Rear Right Q-Panel
Impala
Right Rear Q-Panel
Malibu
Under Shelf (deck) left Side
Monte Carlo
Behind Rear Left Q-Panel
Silverado
Behind Glovebox
Suburban
Behind Glovebox
Tahoe
Behind Glovebox
Trailblazer
Behind Glovebox
Uplander
Above Steering Column
Venture
Above Steering Column
GMC
Acadia
Rear Right Q-Panel
Canyon
Behind Glovebox
Denali/XL
Behind Glovebox
Envoy
Behind Glovebox
Sierra
Behind Glovebox
Yukon/Denali
Behind Glovebox
Hummer
H2
Behind Glovebox
H3
Behind Glovebox
Isuzu
Ascender
Behind Glovebox
Oldsmobile
Alero
Right Front Passenger compartment
Bravada
Behind Glovebox
Silhouette
Above Steering Column
Pontiac
Aztek
Behind Glovebox
Bonneville
Left Rear Q-Panel
Grand AM
Left Rear Q-Panel
Grand Prix
Right Front Passenger Compartment
G6
Rear (Trunk)
G8
Rear (Trunk)
Montana
Above Steering Column
Sunfire
Rear Deck (center)
Vibe
Right Rear Q-Panel
Saab
9-7x
Behind Glovebox
Saturn
Relay
Above Steering Column

Disclaimer
• This product has no affiliation with GM
• We’re not liable for misuse of this product.
•Whenever possible professional installation is recommended.
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