2003 Chevrolet Trailblazer Radio Installation Diagram Needed

carmie909 · 2024-02-11T16:05:34+00:00

I am trying to put in a new head unit, but it has a Boss radio that has an amp i found out. i need a wiring diagram for that so that i can figure out how to wire it up.

JACOBANDNICKOLAS

✓Experienced Mechanic
110,236 POSTS

Hi,

This schematic is for the premium sound system. There is nothing identified as a Boss. See the last pic of my options.

Let me know if this helps.

Take care,

joe

See pics below. Note: I had to cut each schematic page in half to make them readable. I did overlap them so you can follow from one to the next.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Feb 11, 2024 at 9:22 AM

CARMIE909

MEMBER
3 POSTS

Thanks, but not the right one because my stereo connector has A1-A12 and B1-B12 plus and a second smaller connector.

i have pins in A1,A8,A9,A12,B1,B4,B5,B10,B11

Feb 11, 2024 at 3:07 PM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,236 POSTS

Hi,

Do you recognize anything as far as type in the last pic I attached? Is the OEM radio still in the vehicle?

Joe

Feb 12, 2024 at 6:50 AM

CARMIE909

MEMBER
3 POSTS

I still have the radio my guess is maybe the one with rear seat audio.

Feb 12, 2024 at 6:54 AM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,236 POSTS

Hi,

I attached that one below. Many of the pins align but when I got to the B connector, they appear different.

Let me know.

Joe

See pics below.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Feb 12, 2024 at 7:46 AM

radio installation diagram needed?