2004 GMC truck stereo wiring

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=34319
Printed Date: September 14, 2025 at 1:32 PM

Topic: 2004 GMC truck stereo wiring

Posted By: popeye004
Subject: 2004 GMC truck stereo wiring
Date Posted: June 21, 2004 at 8:42 PM

I was just to about install a stereo in a 2004 GMC pickup and I couldn't find the switched ACC wire. I found the ground, 12 volt positive and all the other wires but no ACC wire. Can anyone tell what I might of missed.

The higher the years go the harder its starting to get to install stuff!!!

Replies:

Posted By: Javelin3o4
Date Posted: June 21, 2004 at 9:43 PM

if your running new wires the orange wire in the ignition harness under the dash should be access.

Posted By: popeye004
Date Posted: June 21, 2004 at 10:23 PM

ok and if I want it from the fuse panel which one do I pick acc1 or acc3 I dont think there was a acc2.

Posted By: kgerry
Date Posted: June 22, 2004 at 9:41 AM

the radios dont use a switched acc voltage on the new vehicles.... it utilizes a floating clock circuit

-------------
Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979

Posted By: foltzy
Date Posted: June 22, 2004 at 11:11 AM

from what i was told, you can tag it into the windshield wiper fuse, but that's just ghetto. Tag it off the Accessory wire in the ignition harness..(It should be a 10-12 guage Orange whire leading from the ignition)

Posted By: popeye004
Date Posted: June 22, 2004 at 9:28 PM

Hey guys I got the wire from the heater controls it was a yellow wire is this ok will this work good? it is working fine so far just don't want any sensors to get triped.

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