Discount Car Stereo A2DIY-GM3 Instruction Manual

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Driving without distraction is a necessity for a safer driving experience
A2DIY-GM3
QuickstartInstallationGuideforselect2000-07GMClassII
Created: December 19, 2019
Revised: April 3, 2020

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 A2DIY-GM3 works on
select 2000-09 GM Class-II radios with “CD/AUX”or “TAPE/AUX”button and
compatible with virtually all Bluetooth phones, and sounds great whether using for
mobile conversations, streaming music or AUX input device, (Radios with
“TAPE/CD”button are not compatible with this module).
Also includes a wireless remote control and push-to-talk button. An optional USB
charging port is available to keep power hungry devices charged. Thanks to the
A2DIY-GM3 users keep the radio while enjoying Bluetooth features only available
on newer cars.
The A2DIY-GM3 replaces XM, remote/external CD changer (if present). The CD
Changer built-into radio remains functional. To retain these options, purchase our
A2DIY-GM3x instead.
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. Disconnect factory 12-pin plug from radio (if present) (See Fig. 1)
Fig. 1
GM Class-II radio plugs
2. Connect installation harness 12-pin plug (See Fig. 2) to radio 12-ppin
connector vacated in step 1
Fig. 2
installation harness
Factory 12-pin plug (if present) remains disconnected and 12-pin gray
connector on installation harness remains empty.
3. Connect installation harness yellow wire to battery (always on) supply
and black wire to ground.
4. Connect installation harness 22-pin Molex plug (See Fig. 2) to module 22-
pin Molex connector (See Fig. 3)
Fig. 3

5. Connect male-to-male cable (See Fig. 4) to AUX input on module (See Fig.
3)
Fig. 4
3.5mm male to male cable
6. Connect push-to talk button 1/8” plug to Module “CTR” jack, route button
to front of the dash, remove tape backing and stick to dash (cable is 6ft.
long). (See Fig. 5)
Noteworthy: Push-to-talk button not required for Android devices
because its (2) functions can be performed from included wireless
remote. Push-to-talk button is required for Apple devices
Fig. 5
push-to-talk button
7. Use clip to install microphone to visor or headliner and route cable down
pillar, under dashboard toward module location and connect to module
“MIC” input.
Excursive caution when routing microphone so to not damage the
cable. Also ensure no ventilation duct is pointed towards
microphone.
Microphone
8. Connect installation harness Red wire to 12V Accessory supply in
vehicle. Do not use 12V constant supply (battery).
Fig. 6
Tip: Accessory (ACC) is available on ignition harness, interior fuse box etc.
Accessory power is active when ignition is in “ACC” or “ON “positions.

Optional USB charging port (not for thumb drives etc.)
An optional 3A USB charging port can be added to your A2DIY-GM3. Should you
decide on this add-on, we suggest one of 2 connecting options:
A. Flush to dash/panel requires drilling a ¾” hole
B. Flush with Support bracket (Mount USB terminal wherever your
installation demands without drilling)
A. Flush to Dash or Panel (drilling required)
1. Drill a ¾” hole in the dash or panel using a step drill bit or equivalent
(See Fig. 10)
Fig. 10
Step drill bit
2. Insert male terminal from supplied 3ft. cable (See Fig. 11) through hole
created in step 1 and connect to installation harness charging port (See
Fig. 12)
Fig. 11
Flush mount 3 ft. USB cable
Fig. 12
USB port
3. Snap USB cable head (See Fig. 13) to hole created in step until flush with
mounting surface (See Fig. 14)
Fig. 13
USB head
Fig. 14
Flush mounted to dash
4. Tuck and secure any extra wire from moving parts and test operation

B. Bracket Mount (No drilling)
1. Locate a flat surface at location of choice within 3.2 ft. of module to
mount USB support bracket (See Fig. 15) using adhesive/tape or screws
(included).
Fig. 15
USB mounting bracket
2. Insert USB cable male terminal through hole in bracket (See Fig. 16) and
connect to installation charging port (See Fig. 12)
Fig. 16
3. Snap USB cable head (See Fig. 16) to bracket until flush (See Fig. 17)
Fig. 17
4. Tuck and secure any extra wire away from moving parts and test
operation ( See Bluetooth Pairing and Connection )
Wireless remote control
Pairing wireless remote: The included wireless remote must be paired with
Smartphone for media control functions (does not operate factory radio).
The remote pairs with multiple devices but can only operate one at a time.
Follow 3-step pairing process below:
Installing wireless remote:
Install wireless remote to dashboard or panel with provided holder or double side
tape.

Remote control operation:
With the wireless remote paired to smartphone, users may perform the following
functions on devices with iOS7.0 and higher and Android 4.4 and higher.
In addition to above, use wireless remote:
To answer/end call; press Play/Stop button (Android only)
To switch between streaming and AUX press, Play/Stop button (Android only).
If no AUX device is connected, Play/Stop button pauses stream.
Push-to-talk functions works on both Android and Apple devices:
To answer/end call; press push-to-talk button
To switch between streaming and AUX; press push-to-talk button.
If no AUX device is connected, push-to-talk button pauses stream.
Noteworthy: Push-to-talk button must be used to answer/end calls on
Apple devices; however, both the push-to-talk button and wireless remote
Play/Stop button can be used for this purpose. If you are exclusive to Android,
devices, installing push-to-talk button is optional.
Pairing:
Pairing varies among devices but basic steps are the same. This process is done
upon initial install and will not have to be repeated.
1. Turn ignition and radio “ON”
Blue LED through module peephole will flash (pairing mode)
2. On A2DP device: go to Bluetooth Settings , Tap to Scan
3. Wait for Bluetooth device name (See below) to appear and tap it.
Once paired confirmation tone is heard on car speakers
Test Operation:
1. Turn ignition and radio “ON”
2. Press “CD/AUX” or “TAPE/AUX” button on radio
Note: Radios with “TAPE/DISC”button are not compatible.
3. Launch smartphone music streaming application
4. Place test call or ask someone to call. Use push-to-talk button to accept
call (iPhone and Android) or press pause/play button on remote
(Android only)
Note: Push-to-talk button is used to accept/end calls on both Apple and
Android devices, however wireless remote pause/play button only works
to accept/end calls on Android devices.
5. If correct operation is confirmed go ahead and reinstall radio.
Warning! Playlist and Track selection is *NOT* possible from C5 radio
button. Use audio device built-in controls or optional wireless remote to
access and control audio files and applications.

Frequently asked questions
1. I have an XM Subscription. Will that continue to work?
NO.to retain XM subscription, purchase our A2DIY-GM3x instead.
2. Does the A2DIY-GM3 work on all GM radios?
NO. Works on 2000-09 GM Class-II Radios with “CD/AUX”or “TAPE/AUX”
button. Radios with “TAPE/DISC”button are not compatible.
3. Can I control music streaming app from radio buttons?
NO; you must continue to use audio device built-in controls or included
remote control/or voice commands. User radio volume control to set
playback level.
4. Will radio mute when I receive or make a phone call?
This system will not mute unless radio is in “AUX”mode (Bluetooth mode). If in
AM/FM mode, radio will not mute. In addition, user must switch radio to
Bluetooth Mode (AUX)
5. How to I pair a second phone to module?
In order to pair a second phone, make sure no other phones are connected.
Once Bluetooth is disabled on first device, module will be ready for pairing.
11. My vehicle has the built-in 6-CD changer. Will the A2DIY-GM3 work?
As the name would imply, external or remote CD changer refers to changer
mounted in remote location (e.g. armrest, glove box, trunk, hatch, under seat
etc.)
The changer built-into radio (6-CD changer radio) is internal and not
affected by this module.
Disclaimer
• This product has no affiliation with GM
• We’re not liable for misuse of this product.
•We recommend professional installation
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