Here is the stereo radio wiring information for your 2004 Chevrolet Chevy Avalanche with the standard, symphony, or Bose systems. It will be useful when installing an aftermarket radio, sound stereo system, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your Avalanche. Please check it over and use it as a GUIDE to help you locate the appropriate wires. This schematic is provided free of charge and may not be 100% accurate. Failure to properly test all the wires may lead to vehicle or bodily damage. All information is provided as-is and accuracy is not guaranteed.
If you find any conflicting info please leave a comment with what you found in your Chevrolet Avalanche. If you don’t see the wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!
2004 Chevrolet Avalanche Car Audio Stereo Radio Wiring Diagram Schematic Colors
Car Radio Constant 12v+ Wire: Orange
Car Stereo Ground Wire: Black/White
Car Radio Ignition Switched Wire: N/A DATA
Car Stereo Dimmer Wire: Brown/White
Car Radio Illumination Wire:
Car Stereo Power Antenna:
Car Radio Amp Turn On Wire: Pink +
Left Front Speaker Wire (+) Positive: Tan
Left Front Speaker Wire (-) Negative: Gray
Right Front Speaker Wire (+) Positive: Light Green
Right Front Speaker Wire (-) Negative: Dark Green
Left Rear Speaker Wire (+) Positive: Brown
Left Rear Speaker Wire (-) Negative: Yellow
Right Rear Speaker Wire (+) Positive: Dark Blue or Brown
Right Rear Speaker Wire (-) Negative: Light Blue or Yellow
Center Channel Speaker Wire Positive / Negative:
Subwoofer Speaker Wire Positive / Negative:
Front Speaker Size: N/A
Rear Speaker Size: N/A
Amp Amplifier Location:
Radio Removal: Lower tilt steering wheel to its lowest position. Pop the panel surrounding the radio and instrument cluster and set aside. Remove (3) 7mm screws holding the radio in place. Remove the radio disconnect the wiring harness and antenna connections.
Keep in mind if you are installing a new radio you may need the radio removal keys, the wiring harness, the antenna adapter, and the mounting kit as well.
REQUIRED PARTS FOR AFTERMARKET RADIO INSTALL
WIRING HARNESS FOR NON BOSE:
Axxess LC-GMRC-01 GM Class 2 Data Bus Interface
WIRING INTERFACE FOR BOSE SYSTEM:
Axxess GMOS-04 Class II OnStar® Interface for Amplified Systems
MOUNTING KIT FOR SINGLE OR DOUBLE DIN AFTERMARKET RADIOS:
Metra 99-2003 Installation Multi-Kit for 1992-up GM/Suzuki Vehicles
ANTENNA ADAPTER FOR INSTALL:
Metra 40-GM10 GM Antenna Adapter
RECOMMENDED TOOLS FOR THE INSTALL – SAME ONES THE PROS USE!