Here is the audio stereo radio wiring information for your 2003 Chevrolet Cavalier with the standard or Monsoon system. It will be useful when installing an aftermarket headunit, stereo sound system, new radio, or other automotive accessories. Make sure to grab the appropriate tools to test all the wires in your Chevy Cavalier. Please check it over and use it as a GUIDE only 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 2003 Chevrolet Cavlalier. If you don’t see the audio radio wiring diagram you need comment and we will try to add it ASAP. Thanks for looking!
2003 Chevrolet Cavalier Radio Audio Wiring Diagram Schematic Colors – Aftermarket Stereo DIY Installation Help
Car Radio Constant 12v+ Wire: Orange @ Radio Harness
Car Stereo Ground Wire: Black @ Radio Harness
Car Radio Ignition Switched Wire: Class II Data – Use proper harness
Car Radio Dimmer Wire: Gray (+) @ Radio Harness
Car Radio Illumination Wire: Brown (+) @ Radio Harness
Car Stereo Power Antenna: N/A
Car Radio Amp Turn On Wire: Pink @ Radio Harness when equipped
Reverse Trigger: Light Green (+) Driver kick harness to rear
Parking Brake E-Brake Trigger: Light Blue (-) @ e-brake
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
Right Rear Speaker Wire (-) Negative: Light Blue
Center Channel Speaker Wire Positive / Negative: N/A
Subwoofer Speaker Wire Positive / Negative: N/A
Radio Size: Single Din or Double Din – will require some minor trimming of plastic behind the OEM radio.
Radio Removal Tools: – Dash Removal Plastic Pry Tools
REQUIRED PARTS FOR AFTERMARKET RADIO INSTALL
This harness is for base / non-monsoon / non-premium sound systems and will keep your safety chimes functioning, provide a switched turn on wire, and keep the retained accessory system working. It will NOT retain OnStar or work with the Monsoon system.
If you have the Monsoon or premium sound, use the harness below:
REPAIR REVERSE WIRING HARNESS:
MOUNTING KIT FOR SINGLE DIN AFTERMARKET RADIOS:
MOUNTING KIT FOR DOUBLE DIN AFTERMARKET RADIOS:
OEM AUX AUXILLIARY PORT RETENTION:
STEERING WHEEL CONTROL INTERFACE:
Use this to keep your steering wheel controls working with your new aftermarket radio. All wires connected at the back of the OEM radio:
SPEAKER WIRING ADAPTERS FOR AFTERMARKET SPEAKER INSTALL:
The adapters below will allow you to install a 5 1/4″ or 6.5″ speaker in place of the OEM 4×6″ speakers in the front doors.
RECOMMENDED TOOLS FOR THE INSTALL – SAME ONES THE PROS USE!