2003 Chevrolet Trailblazer Car Stereo Wiring Guide (2024)

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Question: Where can I find a 2003 Chevrolet Trailblazer radio wiring diagram? What are the 2003 Chevrolet Trailblazer radio wiring harness colors?

If you’re looking to change the radio in your 2003 Chevrolet Trailblazer or troubleshoot why your car radio stopped working, we’re here to help!

Our comprehensive 2003 Chevrolet Trailblazer radio wiring diagram shows you all the radio wire harness colors, car speaker wiring colors and car speaker sizes. Use our 2003 Chevrolet Trailblazer stereo wiring guide to help you with your car radio and installation needs.

In This Guide

2003 Chevrolet Trailblazer Car Radio Wiring Diagram
2003 Chevrolet Trailblazer Speaker Wiring Guide
2003 Chevrolet Trailblazer Speaker Sizes and Location

2003 Chevrolet Trailblazer Radio Wiring Diagram

This 2003 Chevrolet Trailblazer radio wiring chart shows you all the 2003 Chevrolet Trailblazer radio wire colors and their functions. Utilize this guide to help you with a car radio install or help with a car radio troubleshoot. If you don’t see the car radio wiring information you’re looking for, please feel free to ask your question at the bottom of this page.

Application	Radio Wire Color
Car Radio Battery Wire (Constant Power 12v+)	Orange
Car Radio Accessory Wire (Switched Power 12v+)	Run a wire to the fuse box or ignition switch harness for switched power.
Car Radio Ground Wire	Black/White
Use a Car Radio Wiring Harness and Car Radio Dash Kit for an Easy Install!
Car Radio Illumination Wire	N/A
Car Stereo Dimmer Wire	N/A
Car Radio Antenna Trigger Wire	N/A
Car Radio Amp Turn-On Trigger Wire	N/A
Car Radio Amp Mute Wire	N/A
Car Radio Amplifier Location	N/A
Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio.

2003 Chevrolet Trailblazer Speaker Wiring Guide

This 2003 Chevrolet Trailblazer speaker wiring chart shows you every speaker wire color and the speaker wire location. Use this 2003 Chevrolet Trailblazer speaker wiring guide to help you with a speaker replacement or speaker upgrade. If the car speaker wiring information you’re searching for is not listed, please don’t hesitate to ask for it at the bottom of this page.

Application	Speaker Wire Color
Front Center Speaker Positive Wire (+)	N/A
Front Center Speaker Negative Wire (-)	N/A
Upgrade your Center Speakers for awesome sound!
Front Left Tweeter Positive Wire (+)	N/A
Front Left Tweeter Negative Wire (-)	N/A
Front Right Tweeter Positive Wire (+)	N/A
Front Right Tweeter Negative Wire (-)	N/A
Upgrade your Tweeters for cleaner audio highs!
Front Left Speaker Positive Wire (+)	Tan
Front Left Speaker Negative Wire (-)	Gray
Front Right Speaker Positive Wire (+)	Light Green
Front Right Speaker Negative Wire (-)	Dark Green
Use a Speaker Wire Harness for easy Speaker Installation!
Rear Left Tweeter Positive Wire (+)	N/A
Rear Left Tweeter Negative Wire (-)	N/A
Rear Right Tweeter Positive Wire (+)	N/A
Rear Right Tweeter Negative Wire (-)	N/A
Upgrade your Tweeters for cleaner audio highs!
Rear Left Speaker Positive Wire (+)	Brown
Rear Left Speaker Negative Wire (-)	Yellow
Rear Right Speaker Positive Wire (+)	Dark Blue
Rear Right Speaker Negative Wire (-)	Light Blue
Upgrade your Subwoofer for deeper lows!
Subwoofer Positive Wire (+)	N/A
Subwoofer Negative Wire (-)	N/A

2003 Chevrolet Trailblazer Speaker Sizes and Location

This 2003 Chevrolet Trailblazer speaker size chart shows your speaker measurements and speaker locations. Use this chart to see what speaker fits in your 2003 Chevrolet Trailblazer.

Application	Speaker Size and Location
Front Center Speaker Size	N/A
Front Center Speaker Depth	N/A
Front Center Speaker Location	N/A
Upgrade your Center Speakers for awesome sound!
Front Tweeter Size	N/A
Front Tweeter Depth	N/A
Front Tweeter Location	N/A
Upgrade your Tweeters for cleaner audio highs!
Front Speaker Size	6.5″ Speakers
Front Speaker Depth	3.5″ Depth
Front Speaker Location	Front Doors
Use a Speaker Wire Harness for easy Speaker Installation!
Rear Tweeter Size	N/A
Rear Tweeter Depth	N/A
Rear Tweeter Location	N/A
Use a Speaker Wire Harness for easy Speaker Installation!
Rear Speakers Size	6.5″ Speakers
Rear Speaker Depth	3.5″ Depth
Rear Speaker Location	Rear Doors
Upgrade your Subwoofer for deeper lows!
Car Subwoofer Speaker Size	N/A
Car Subwoofer Speaker Depth	N/A
Car Subwoofer Speaker Location	N/A

Questions and Answers

If you have any questions about your 2003 Chevrolet Trailblazer radio installation, please don’t hesitate to post them at the bottom of this page. We’re committed to finding the answers you need, and members of the Modified Life community may also provide valuable insights into the car stereo information you’re looking for. Don’t hesitate to ask your car audio question; it could benefit others seeking the same answers!

Contribute

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