Metra Electronics 108-GM3B User manual

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INSTALLATION INSTRUCTIONS
108-GM3B
Attention! Let the vehicle sit with the key
out of the ignition for a few minutes before
removing the factory radio. When testing the
aftermarket equipment, ensure that all factory
equipment is connected before cycling the
key to ignition.
Patent Pending
KIT FEATURES
• Designed specifically for the Pioneer DMH-C5500NEX 8-inch radio
• Painted scratch resistant matte black to match the factory finish
KIT COMPONENTS
•A) Display screen housing • B) Display screen trim bezel • C) Display screen brackets • D) Panel clips (6) • E) Phillips screws (4)
TOOLS REQUIRED
• Panel removal tool • Phillips screwdriver
• 9/32” socket wrench
TABLE OF CONTENTS
Dash Disassembly ................................................... 2
Kit Assembly .............................................................3
WIRING & ANTENNA CONNECTIONS
Wiring Harness: Refer to axxessinterfaces.com for
wiring harness options
Antenna Adapter: 40-EU55 (sold separately)
Steering Wheel Control Interface: ASWC-1
(sold separately)
RGB Extension Cable: Pioneer part # CD-RGB150E
(not sold by Metra)
A B C D E
Chevrolet Camaro 2016-Up
Visit MetraOnline.com for more detailed information about the product and up-to-date vehicle
specific applications

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2
DASH DISASSEMBLY
Models equipped with a 7-inch
touchscreen radio:
1. Unclip, unplug, and remove the radio
control trim panel surrounding the radio.
(Figure A)
2. Remove (4) 9/32” screws securing the
radio, then unplug and remove.
(Figure B)
(Figure A) (Figure C)
(Figure B) (Figure D)
Models equipped with an 8-inch
touchscreen radio:
1. Unclip and remove the trim surrounding
the radio controls. (Figure C)
2. Remove (2) 9/32” screws securing the
radio, then unplug and remove.
(Figure D)
Continue to Kit Assembly

REV. 1/21/2020 INST108-GM3B 3
1. Secure the display screen housing to the
dash using the factory hardware.
(Figure A)
Note: For vehicles equipped with an
8-inch touchscreen radio, remove (2)
9/32” screws from the dash beforehand.
2. Remove the locator pins stamped “7”
from the display screen brackets. Using
the holes stamped “8”, secure the
display screen to the brackets using (6)
screws supplied with the radio.
(Figure B)
Note: Reference the installation manual
provided with the radio for which
hardware to use. The display screen and
radio chassis use two different types
of screws.
3. Find a suitable location for the radio
chassis. Route the RGB extension cable
from the radio chassis to the display
screen, then connect it to the
display screen.
KIT ASSEMBLY
(Figure A) (Figure C)
(Figure B) (Figure D)
4. Secure the assembly to the display
screen housing using (4) Phillips screws
provided. (Figure C)
5. Locate the factory wiring harness and
antenna connector in the dash and
complete all necessary connections to
the radio assembly. Metra recommends
using the proper mating adapter from
Metra and/ or Axxess. Test the radio for
proper operation.
6. Attach (6) panel clips provided onto the
display screen trim bezel, then clip the
bezel over the radio to complete the
installation. (Figure D)

KNOWLEDGE IS POWER
Enhance your installation and fabrication skills by
enrolling in the most recognized and respected
mobile electronics school in our industry.
Log onto www.installerinstitute.com or call
800-354-6782 for more information and take steps
toward a better tomorrow.
®
Metra recommends MECP
certified technicians
Metra. The World’s Best Kits.®MetraOnline.com © COPYRIGHT 2020 METRA ELECTRONICS CORPORATION REV. 1/21/20 INST108-GM3B
INSTALLATION INSTRUCTIONS
108-GM3B
If you are having difficulties with the installation
of this product, contact our Tech Support line
either by phone at 1-800-253-TECH, or email at
[e-mail]. Before
doing so, look over the instruction booklet a
second time and ensure that the installation was
performed exactly as the instruction booklet
is stated. Have the vehicle apart and ready to
perform troubleshooting steps before contacting
Metra/Axxess Tech Support.