2008 Chevrolet Trailblazer Stereo Wiring Diagram

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Whether your an expert Chevrolet Trailblazer mobile electronics installer, Chevrolet Trailblazer fanatic, or a novice Chevrolet Trailblazer enthusiast with a 2008 Chevrolet Trailblazer, a car stereo wiring diagram can save yourself a lot of time. Automotive wiring in a 2008 Chevrolet Trailblazer vehicles are becoming increasing more difficult to identify due to the installation of more advanced factory oem electronics.

One of the most time consuming tasks with installing an after market car stereo, car radio, satellite radio, xm radio, car speakers, tweeters, car subwoofer, crossovers, audio equalizer, car amplifier, mobile amp, car amplifier, mp3 player, ipod or any car audio electronics is identifying the correct color car audio wires for your 2008 Chevrolet Trailblazer headlight bulb size you need for your low beam or high beam and save time. Also, find your other car light bulb sizes including your fog light, reverse light, turn signal, brake light and more. It’s that easy!

The Modified Life staff has taken all its Chevrolet Trailblazer car radio wiring diagrams, Chevrolet Trailblazer car audio wiring diagrams, Chevrolet Trailblazer car stereo wiring diagrams, Chevrolet Trailblazer car radio wiring schematics, Chevrolet Trailblazer car wiring diagrams and cataloged them online for use by our visitors for free. Our automotive wiring diagrams allow you to enjoy your new mobile electronics rather than spend countless hours trying to figure out which wires goes to which 2008 Chevrolet Trailblazer part or component.

Feel free to use any Chevrolet Trailblazer car stereo wiring diagram that is listed on Modified Life but keep in mind that all information here is provided “as is” without any warranty of any kind and most of the car audio wiring diagrams listed on our enthusiast website are submitted by the Modified Life community. Use of the Chevrolet Trailblazer wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2008 Chevrolet Trailblazer.


If you have any questions pertaining to the audio system in the 2008 Chevrolet Trailblazer, please feel free to post it at the bottom of this page and either we’ll do our best to find you the information you need or hopefully someone in the Modified Life community will have the information you’re looking for.

Request a Car Stereo Wiring Diagram

If you can’t find a particular car audio wire diagram on Modified Life, please feel free to post a car radio wiring diagram request at the bottom of this page and we’ll do our best to find you the diagram or schematic you need for your mobile audio installation.

Adding More Information

If you would like to help the Modified Life community by adding any missing information or adding a new car audio wire diagram to our resource, please feel free to post it at the bottom of this page.

2008 Chevrolet Trailblazer Stereo Wiring Diagram

ApplicationWire Color
Car Radio Battery Constant 12v+ WireOrange
Car Radio Accessory Switched 12v+ WireThe radio harness does not provide a switched power source. Run a wire to the fusebox for switched power.
Car Radio Ground WireBlack/White
arrow Use a Car Radio Wire Harness and Car Radio Dash Kit for an Easy Car Radio Install!
Car Radio Illumination WireN/A
Car Stereo Dimmer WireN/A
Car Stereo Antenna Trigger WireN/A
Car Stereo Amp Trigger WireN/A
Car Stereo Amplifier LocationN/A
arrow Use an Amp Integration Harness to Connect Your Factory Amplifier to an aftermarket radio.
Front Tweeter SizeN/A
Front Tweeter DepthN/A
Front Tweeter LocationN/A
arrow Use a Speaker Wire Harness for Easy Speaker Installation!
Front Speakers Size6 1/2″ Speakers
Front Speaker Depth3.5″
Front Speakers LocationDoors
Left Front Speaker Positive Wire (+)Tan
Left Front Speaker Negative Wire (-)Gray
Right Front Speaker Positive Wire (+)Light Green
Right Front Speaker Negative Wire (-)Dark Green
arrow Use a Speaker Wire Harness for Easy Speaker Installation!
Rear Speakers Size 6 1/2″ Speakers
Rear Speaker Depth3.5″
Rear Speakers LocationN/A
Left Rear Speaker Positive Wire (+)Brown
Left Rear Speaker Negative Wire (-)Yellow
Right Rear Speaker Positive Wire (+)Dark Blue
Right Rear Speaker Negative Wire (-)Light Blue
arrow Use a Steering Wheel Control Adapter to Keep Your Steering Wheel Controls.

2 thoughts on “2008 Chevrolet Trailblazer Stereo Wiring Diagram”

  1. Micky, double check ALL your fuses using an Automotive Fuse Tester because certain vehicles may have a wire tied into another circuit not labeled as car radio. You may have additional fuse boxes by the driver side of the dash, passenger side of the dash, driver kick panel, passenger kick panel, under the steering column or under the hood. If all of your fuses are good, your 2008 Chevrolet Trailblazer factory amplifier (if equipped) may be faulty. We suggest you take your car to an experienced audio installer and have them troubleshoot your problem. Hope this helps. Good luck with your 2008 Chevrolet Trailblazer radio troubleshooting.

  2. My speakers in the doors will work periodically. Speakers in front dash work all the time. Where do I need to check to see if wire is loose?


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