Key on fuse for radio on 05 chevy pickup

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=71617
Printed Date: July 04, 2025 at 10:14 AM

Topic: Key on fuse for radio on 05 chevy pickup

Posted By: mastermarine
Subject: Key on fuse for radio on 05 chevy pickup
Date Posted: January 27, 2006 at 12:08 PM

Hello,

I am installing many handsfree kits in newer Chevy and GMC trucks. I have noticed that the radio stays on until the door is opened. I was wondering if anyone knew which fuse (if any) controls this function so I could tap into it for the ignition lead on the handsfree kits. I looked at a wiring list for a 2005 Chevy truck on this site and it says the ignition connection on the radio is Class 2 Serial. What does that mean?

Also, does anyone know about a mute lead on the radio?

Thanks,

MasterMarine

Replies:

Posted By: Hornshockey
Date Posted: January 27, 2006 at 2:09 PM

the radio is controlled by a databus wire, there is no power wire that will remain on until a door is opened. The only way to acheive this on the newer GM products is with a databus interface, or you can build a RAP relay setup like the ones in the relays section on this page.

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Life moves pretty fast; if you don't stop and look around once in a while; you could miss it.

Posted By: mastermarine
Date Posted: January 27, 2006 at 6:15 PM

Thank you for the quick reply.

Is there a mute lead?

thanks,

mastermarine