2003 GM & up Radio Install

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=65266
Printed Date: May 11, 2025 at 11:31 PM

Topic: 2003 GM & up Radio Install

Posted By: Fastlearner
Subject: 2003 GM & up Radio Install
Date Posted: October 29, 2005 at 9:58 PM

Me and another installer had an arguement about doing basic radio installs in any gm car made after 2003. He heard from someone that no matter what kind of radio that it would need the GM09B harness from scosche. He claims that if you don't use that harness, that check engine lights and air bag lights will go on. However i have done several gm radios over the years using a standard harness and have not have one check enging light on. I know though that if it has rds you need that harness. Is there anyone else that heard about this.

Replies:

Posted By: Hornshockey
Date Posted: October 29, 2005 at 10:23 PM

The radio is not tied in with the check engine light or SRS system. The RAP(retained accessory power) and warning chimes are the only features lost by using the cheaper harness. Well, that and you have to run a new ign wire if you use the standard harness. But with a couple of relays you can set up your own RAP circuit using the diagrams on this site.

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Posted By: Fastlearner
Date Posted: October 29, 2005 at 10:26 PM

That's what i said. But he still refuses to do a deck even in a 2004 base model cavalier with the 100 dollar harness