GMC GM3x-HF Quick Start Installation Manual
GMC GM3x-HF Quick Start Installation Manual

GMC GM3x-HF Quick Start Installation Manual

Class ii vehicles with xm tuner or remote cd changer

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Courtesy of:DiscountCarStereo.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, 2016
Revised: October 16, 2019

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  • Page 1 Courtesy of:DiscountCarStereo.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, 2016 Revised: October 16, 2019...
  • Page 2 Safety comes first when you’re on the road, so having an intuitive and easy to 2. Connect factory 12-pin plug into 12-pin connector on installation use Bluetooth kit is essential to reducing driver distraction. The GM3x-HF kit is harness (See Fig. 2)
  • Page 3 Fig. 5 Module Fig. 4 7. Connect shorter 3.5mm plug from installation harness (See Fig. 4) to 4. Retaining XM Subscription Or remote CD changer playback: 3.5mm jack on module pigtail cable (See Fig. 6) Connect longer 3.5mm plug from installation harness (See Fig. 4) to “XM/AUX* jack on module (See Fig.
  • Page 4 10. Connect control button/mic (See Fig. 7) to module (See Fig. 5) USB Charging Port Options: Should you decide to use it, we suggest one of 3 connecting options: A. Flush to dash/panel requires drilling a ¾” hole in the dash B.
  • Page 5 USB with Bracket Mount (No drilling) Locate a flat surface at location of choice within 6 ft. of radio to mount USB support bracket (See Fig. 14) using the adhesive backing or screws Fig. 11 Module USB port Install USB head (See Fig. 12) in place and flush with mounting surface (See Fig.
  • Page 6 Bluetooth Pairing and Connection See Initial Radio Setup operation ( This process is required the first time you use the GM3x-HF. After initial pairing, the GM3x-HF will automatically reconnect with phone upon entering vehicle. Un-Mounted (Free Standing) Terminal Turn vehicle ignition to “ON”.
  • Page 7 Bluetooth Operation Bluetooth range is approximately 30 ft. make sure device is within range Voice command compatible with Apple (Siri), Android (Google Now), Press “BAND” button on radio to enter XM mode or CD/AUX button to Blackberry (Assistant) enter external CD Changer mode * Control button will not control XM/Aux functions.
  • Page 8 Bluetooth Mode. My second phone does not pair or find the Bluetooth Module? My vehicle has XM Tuner but no subscription. Will the GM3x-HF work In order to pair a second phone make sure no other phones are connected.

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