1985 C10 Radio Wiring harness

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Jawilson107

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Sep 20, 2025
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Location
Indiana
First Name
Jay
Truck Year
1985
Truck Model
C10
Engine Size
350
hello, I’m trying to install a new radio for my truck and the previous owner hacked up the wires to the radio. I am just trying to figure out what wires to use. It has two dash speakers and two rear speakers. Anything will help thanks
 

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Jgonick

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Location
West Texas
First Name
Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
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Jgonick

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West Texas
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Joel
Truck Year
1985
Truck Model
K10
Engine Size
350
These attachments are better than the diagram I posted
 

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Last edited:

edgephoto

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Stafford, CT
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Greg
Truck Year
1987
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GMC V3500
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7.4L
I am installing a factory Delco in my 1987. Bought one that someone here modded to have Bluetooth. I have owned this truck since 1988 and when Installed a nice Kenwood cassette radio. Well that unit is dead and who has cassettes any more? Now I have to reconnect factory connectors.
 

Jawilson107

Junior Member
Joined
Sep 20, 2025
Posts
2
Reaction score
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Location
Indiana
First Name
Jay
Truck Year
1985
Truck Model
C10
Engine Size
350
These attachments are better than the diagram I posted
Wish I would’ve saw this earlier lol took a look at this diagram after I finished rewiring. Did all of the wrong wires… Ended up fixing the courtesy light under the dash lol. Thank you I’ll probably just cut the connections off and rewire them tomorrow.
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