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Introduction: 

Safety comes first when you’re on the road, so having an intuitive and easy to 

use Bluetooth kit is essential to reducing driver distraction. The GM3x-HF kit is 
compatible with virtually all Bluetooth phones, and sounds great whether using 
for mobile conversations, streaming music or listening to XM or remote CD 
changer. A USB Charging port is included to keep power hungry devices charged 
and a stylish control button with built-in mic to launch Voice recognition 
application (Siri, Google Now, Blackberry Assistant etc.). Thanks to the GM3x-HF 
Kit you can 

keep the stereo, retain XM or *remote CD changer

 while enjoying 

Bluetooth features only available on newer cars.   

Note

: XM subscription not required for operation, however subscribers retain 

the service

If not subscribed, the module AUX input can be used to connect and 

play audio devices such as Mp3 players, satellite radio kit, Remote CD changer 
(if present, remains operational. (remote changer is not built-into radio) 

See 

Frequently Asked question

 at the end of this guide for more details. 

Installation:

 

Radio must be removed from dash (Vehicle specific radio removal 
instructions are not part of this guide, but available upon request) 

1.

 

Unplug 12-pin plug from radio by pressing gray locking tab (See

 Fig. 1

 

Fig. 1

  

GM Class-II radio plugs 

 

2.

 

Connect factory 12-pin plug into 12-pin connector on installation 
harness  (

See Fig. 2)

 

 

Fig. 2 

harness 12-pin connector 

3.

 

Connect 12-pin plug from installation harness (See 

Fig. 3

) to 12-ppin 

connector on radio vacated in step 1 

 

Fig. 3 

harness 12-pin plug

 

Summary of Contents for GM3x-HF

Page 1: ...reo com Driving without distraction is a necessity for a safer driving experience GM3x HF Quick start Installation Guide for GM Class II Vehicles with XM Tuner or Remote CD Changer Created July 19 201...

Page 2: ...ars Note XM subscription not required for operation however subscribers retain the service If not subscribed the module AUX input can be used to connect and play audio devices such as Mp3 players sate...

Page 3: ...one out Use included 3 5mm male to male cable See Fig 4a to connect your audio device to module XM AUX input jack Fig 4a 3 5mm male to male cable Fig 5 Module 7 Connect shorter 3 5mm plug from install...

Page 4: ...entilation duct is pointed towards the mic It is best to mount button facing driver USB Charging Port Options Should you decide to use it we suggest one of 3 connecting options A Flush to dash panel r...

Page 5: ...See Enabling the AUX section below B USB with Bracket Mount No drilling 1 Locate a flat surface at location of choice within 6 ft of radio to mount USB support bracket See Fig 14 using the adhesive b...

Page 6: ...drilling Secure module and proceed to section next section Bluetooth Pairing and Connection This process is required the first time you use the GM3x HF After initial pairing the GM3x HF will automatic...

Page 7: ...on twice Activate Voice Control Press hold button for 2 seconds Notes 1 If playback is distorted adjust volume on Bluetooth device 2 To reset Module press and Hold button for 5 seconds this will not u...

Page 8: ...n instead of XM CD Changer 7 Where is the best place to install control button mic We found that having the control button mic mounted higher on the dash worked best but users can experiment with diff...

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