Owner's Manual

ADS-RR(SR)-GMS03-DS-IG-EN maestro.idatalink.comAutomotive Data Solutions Inc. © 2019
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GMC Sierra ClaSSiC With 4.2" and 8" radioS 2019
INSTALLATION INSTRUCTIONS
BEFORE INSTALLING
• Determine if the vehicle has a Bose amplifi er. Look for
badges on the radio, door panels, and dash that indicate
that the vehicle has Bose.
If the vehicle DOES NOT have a factory amplifi er:
complete the installation as shown in the wiring diagram
without an amplifi er.
If the vehicle DOES have a factory amplifi er:
complete the installation as shown in the wiring diagram with
an amplifi er. The amplifi er cannot be retained; it must be
bypassed or replaced with an aftermarket amplifi er. See the
vehicle reference chart for wire colors; bypass instructions
are not included.
• Remove the factory radio.
STEP 1
• Unbox the aftermarket radio and locate its main harness.
• Refer to the wiring diagram and connect the wires from
aftermarket radio main harness to the GM3 T-harness and
match the wire functions.
STEP 2
• If the vehicle is equipped with an OEM backup camera,
connect the backup camera harness to the Human
Machine Interface module harness, located behind the
glove box. Note: The guide lines of the backup camera will
not be retained.
Note: if the vehicle does not have the Human Machine
Interface module plug the Red connector of the Backup
Camera RCA into the red connector coming out the Gray 20
pin of the GM3 harness.
STEP 3
• Connect the factory harness to the GM3 T-harness.
STEP 4
Plug the climate control portion of the GM3 T-harness into
the climate controls.
STEP 5
• Plug the male BLACK 3 pin connector of your GM3
T-harness into the OBDII/SW control harness.
• Plug the OBDII connector into the OBDII of the vehicle.
STEP 6
If the vehicle has steering wheel controls:
• Remove steering column shroud.
• Locate the steering wheel control wire T-harness that
comes with the GM3 harness.
• Confi gure the connectors as shown in the diagram.
• Plug the steering wheel control T-harness into the
steering wheel harness located at the top of the steering
wheel.
STEP 7
• Plug the aftermarket radio harnesses into the aftermarket
radio.
• Connect the backup camera RCA cable harness into the
aftermarket radio.
• Plug the Data cable to the data port of the aftermarket
radio.
• Insert the Audio cable into the iDatalink 3.5 mm audio
jack of the aftermarket radio (if there is no iDatalink audio
input, connect to AUX).
Note: On Pioneer radio, ensure that there is nothing
plugged into the W/R port.
STEP 8
• Connect all the harnesses to the Maestro RR module then
test your installation.
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