Car Stereo Radio Wiring Diagram – 2003 Chevrolet Suburban

Whether your an expert installer or a novice enthusiast with a 2003 Chevrolet Suburban, an automotive wiring diagram can save yourself time and headaches. One of the most time consuming tasks with installing a car stereo, car radio, car speakers, car amplifier, car navigation or any mobile electronics is identifying the correct wires for a 2003 Chevrolet Suburban.

The Modified Life staff has put their heads together to create an invaluable resource containing free car stereo wiring diagram, free car wiring diagram and free radio wiring diagram. Feel free to use any 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. Use of the wiring information is at your own risk. Always verify all wires, wire colors and diagrams before applying any information found here to your 2003 Chevrolet Suburban.

If you can’t find your car radio or stereo wire diagram on Modified Life, please feel free to post a car wiring diagram request (Radio Wiring Diagram Request Page) and we’ll do our best to find you the information you need for your mobile installation.

2003 Chevrolet Suburban Car Stereo Radio Wiring Diagram

Radio Constant 12V+ Wire: Orange
Radio Switched 12V+ Wire: (Class 2 Serial Data)
Radio Ground Wire: Black/White
Radio Illumination Dimmer Wire: N/A
Radio Antenna Trigger Wire: Dark Green
Radio Amplifier Trigger Wire: Pink
Front Speakers Size: N/A
Front Speakers Location: N/A
Left Front Speaker Wire (+): Tan
Left Front Speaker Wire (-): Gray
Right Front Speaker Wire (+): Light Green
Right Front Speaker Wire (-): Dark Green
Rear Speakers Size: N/A
Rear Speakers Location: N/A
Left Rear Speaker Wire (+): Brown
Left Rear Speaker Wire (-): Yellow
Right Rear Speaker Wire (+): Dark Blue
Right Rear Speaker Wire (-): Light Blue

5 thoughts on “Car Stereo Radio Wiring Diagram – 2003 Chevrolet Suburban”

  1. Alex, most late model vehicles do not have RCA outputs on the factory radio to feed an audio signal to your aftermarket amplifier. You would have to install a line out converter to supply an audio output. Here is the Line-Out Converter you need:

    Scosche 2-Channel Speaker to RCA Line Out Converter

    When splicing in the RCA Line Out Converter, tap your factory rear speaker wires to get a full range audio source. We suggest you invest in some solid wire taps that wont come loose. These wire tap connectors will allow you to tap into wires without cutting and installs in seconds by hand with no crimping or tools required. If you’ve never installed car audio before, we advise you to take your car to an experienced mobile audio installer. Hope this helps. Good luck with your 2003 Chevrolet Suburban amplifier installation.

  2. is there a way i can add an RCA output from my factory stereo to an aftermarket amp? or can i switch the factory amp with an aftermarket one? i dont want an aftermarket stereo headunit, so that wont be an option for me. thanks

  3. hi i have a 02 suburban and when i put in the aftermarket cd player it doesnt always have sound i used one of the wire harnesses that just plugs in to the factory harness but sometimes i will start the truck and everthing works fine and then somtimes the cd player works fine but there is no sound at all to the speakers is this somthing to do with the built in amp or the onstar and what can i do to get sound 100% of the time instead of the 50% i get it now

  4. In most cases, the installation of an after market radio in your 2003 Chevrolet Suburban will not affect the air bags and/or door chime.

  5. Will it affect my air bags or door chime if I install an after market radio by simply connecting the necessary wires without a wiring harness? The model I have doesn’t have on-star.


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