2004 GM HV Stereo
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=35443
Printed Date: July 27, 2025 at 7:07 AM
Topic: 2004 GM HV Stereo
Posted By: n2themix
Subject: 2004 GM HV Stereo
Date Posted: July 12, 2004 at 8:08 AM
can this HUehicle dependency? be used outside of the vehicle or is there too much interconnectivity with the CPU and accesories to create an in vehicle dependency?
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Dave
Replies:
Posted By: kgerry
Date Posted: July 12, 2004 at 10:05 AM
it wont power up outside of the vehicle...
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: n2themix
Date Posted: July 15, 2004 at 9:40 PM
is there any way to defeat this with wiring, harness splicing etc.
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Dave
Posted By: lspker
Date Posted: July 15, 2004 at 9:50 PM
Some GM radio's require info on the data line to confirm they installed in the proper car. Other are normal and don't require anything special to work, just the harness.
Posted By: Beowulf31539
Date Posted: July 15, 2004 at 11:24 PM
So let's say you bypass the data line and connect your 12 volt acc. wire on a new head unit directly to the fuse box. Will it affect anything else on the vehicle or does the data line need to be connected to factory radio at all times?
Posted By: kgerry
Date Posted: July 16, 2004 at 10:00 AM
what exactly is the question? whether you can use a factory HU from this vehicle outside the car? (no) or whether you can use another radio in this vehicle? (yes, with the proper data interfaces)
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: Beowulf31539
Date Posted: July 16, 2004 at 10:34 AM
What exactly is the information on the data line of an HV Stereo? I know the door chimes, but what else? I'm asking because my brother-in-law wants to hook his old cd player(out of the truck he wrecked) up in his new truck. It's a pioneer or JVC, I'm not sure. I know it's not HV. He's wanting to bypass the data line if possible but I told him I didn't know what information was on that data line. Any help would be appreciated.
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