Discount Car Stereo A2DIY-GM3 Instruction Manual

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A2DIY-GM3
QUICK START BLUETOOTH INSTALLATION GUIDE FOR SELECT 2000-07 GM CLASS -II RADIOS
Created: December19, 2019
Revised: November11, 2020

Introduction:
Safety comes first when you’re on the road, so an intuitive easy to use Bluetooth
kit is essential to reducing driver distraction and compliance with many cell phone
driving restriction laws. The A2DIY-GM3 works on select 2000-08 GM Class-II
radios with “CD/AUX” or “TAPE/AUX” button and compatible with virtually all
Bluetooth phones. Warning: Radios with “TAPE/CD” or “TAPE/DISC” button
are not compatible with this module.
A smart remote and push button are standard, but users may add an optional USB
“Fast charge” kit to keep power hungry devices charged while on the road. Thanks
to the A2DIY-GM3 users keep the factory radio while enjoying Bluetooth features
only available on newer cars.
The A2DIY-GM3 replaces XM, remote/separate CD changer (if present).
To retain XM or separate CD changer, 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. Press release tab on factory 12-pin plug and remove (See Fig. 1)
Fig. 1
GM Class-II radio plugs
2. Connect installation harness 12-pin plug (See Fig. 2) to radio 12-pin
connector vacated in step 1
Fig. 2
installation harness
If radio does not have a 12-pin plug, 12-pin connector on installation
harness (See Fig.2) remains empty.
3. Connect installation harness yellow wire to battery (always on) supply
and black wire to ground. (we recommend grounding to radio chassis)
4. Connect installation harness Red wire to a 12V Accessory supply in
vehicle. Avoid connecting this wire to 12V constant supply (battery).
Tip: Accessory supply available on BROWN wire under steering column (Most
GM’s) or on climate control harness or in driver side fuse panel.
Always use voltmeter to verify voltage and check for engine noise prior to
finalizing.
Accessory power is active when ignition is in “ACC” or “ON “positions.

5. Connect installation harness 22-pin Molex plug (See Fig. 2) to module 22-
pin Molex connector (See Fig. 3)
Fig. 3
6. Connect included male-to-male audio cable (See Fig. 4) to module AUX
jack (See Fig. 3) and route to dashboard area where audio device will
reside (within 3 ft.)
Fig. 4
3.5mm male to male cable
7. Connect push button 1/8” plug to Module “CTR” jack, route button to front
of the dash, remove tape backing and attach to dash (cable is 6ft. long).
(See Fig. 5)
Noteworthy: Push button not required for Android devices because its
(2) functions can be performed from included smart remote. Push button
however is required for all Apple devices.
Fig. 5
push button
8. 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.
Exercise caution when routing both cables so to not damage the cables.
Also ensure no ventilation duct is pointed towards microphone.
Microphone
Fig. 6

Optional push button with built-in microphone:
This option replaces standard visor microphone and separate push button
shown in Fig. 5 and 6, and combines both into a single button. (See images
below) and installed to dashboard within driver reach or custom installed
nearby.
To install simply connect 1/8” plug to module “MIC/CTR” jack (See Fig. 3),
route to dash area (cable is 6ft. long); clean surface, remove tape backing and
secure to dash.
6. Red wire on installation harness must be connected to a 12V Accessory
supply in vehicle. Avoid connecting this wire to 12V constant supply
(battery).
Tip: Accessory (ACC) supply available on BROWN wire (Most GM’s) under
steering column or on climate control harness or in driver side fuse panel.
Always use voltmeter to verify voltage and check for engine noise prior to
finalizing.
Accessory power is active when ignition is in “ACC” or “ON “positions.
USB “fast charging”Option: (not for thumb drives etc.)
An optional USB charging port can be added to your module. 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. Connect YELLOW wire to 12V battery or Accessory supply (your choice).
When connected to battery supply, charging is possible at all times. When
connected to Accessor supply, charging is possible only when key is set
to ACC or ON positions.
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 )
Smart remote
Pairing Smart remote: The included smart remote must be paired you’re
your Smartphone for media control functions (does not operate factory radio).
Pair remote to multiple devices but can only operate one at a time.
Follow 3-step pairing process below:
Installing smart remote:
Install wireless remote to dashboard or panel with provided holder or double side
tape.
Remote control operation:
Once paired to your smartphone, perform the following functions on iOS7.0 and
higher and Android 4.4 and higher.
In addition to above, use wireless remote:
To answer/end call; press Play/Stop (Android only)
To switch between streaming and AUX press, Play/Stop (Android only). If no
AUX device is connected, Play/Stop will pause stream.

Push button works both Android and Apple devices:
To answer/end call; press push button once
To switch between streaming and AUX; press push button once.
Press push button twice in quick succession to redial last number.
If no AUX device is connected, push button pauses stream.
Noteworthy: Push button must be used to answer/end calls on Apple
devices; however, both the push button and smart remote Play/Stop can be
used for this purpose. If you are exclusive to Android devices, push button
installation becomes 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”
Check that Blue LED is flashing through peephole (pairing mode)
2. On A2DP device: go to Bluetooth Settings , Tap 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 button to accept call
(iPhone and Android) or press pause/play on remote (Android only)
Note: Push button is used to accept/end calls on both Apple and Android
devices, however wireless remote pause/play only works to accept/end
calls on Android devices.
5. If correct operation is confirmed go ahead and reinstall radio.
Playlist and Track selection is *NOT* possible from the
radio. You must use Smartphone built-in controls to
access music files

Frequently asked questions
1. My XM subscription is active. Will it still 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. Website shows “In stock”, but why does it take 2-3 days to ship?
Assembly time of 2-3 days required to assemble kit based on options selected
at checkout. Delivery time begins once shipped. For more see FAQ page here.
4. Can I control music streaming apps from radio buttons?
NO; you must continue to use audio device built-in controls or included
remote/or voice commands. Use radio volume knob to set playback level.
5. Will radio mute when I receive or make a phone call?
This system does not have a mute function, however; if radio is in “AUX” mode
(Bluetooth mode) streaming will mute by default. If radio is in AM/FM mode, it
will not mute. In addition, user must switch radio to Bluetooth Mode (AUX) in
order to hear caller on car speakers.
6. How do I pair a second phone to module?
Ensure no phone is connected, at which point module will be ready for pairing.
11. My vehicle has the 6-CD changer built-into radio. Will this module work?
CD changer built-into radio (6-CD changer radio) is internal and its operation
is not affected by this module. XM or any remote CD Changer in (e.g.
armrest, glove box, trunk, hatch, under seat etc.) must be disconnected.
To retain remote CD changer or XM, purchase our A2DIY-GM3x instead.
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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