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need a diogram for a 2003 avalanche

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=35457
Printed Date: August 02, 2025 at 6:12 PM


Topic: need a diogram for a 2003 avalanche

Posted By: KIKIPOYAS
Subject: need a diogram for a 2003 avalanche
Date Posted: July 12, 2004 at 12:49 PM

hey does eny body have a diogram for a chevrolet avalanche 2003, im triying to put a after market radio and i can't get it to work thank u.



Replies:

Posted By: raydawg357
Date Posted: July 13, 2004 at 12:37 PM
Does your truck have Onstar?  I would recommend purchasing a metra harness and not cutting your factory harness.  Do so will effect other features in your truck.

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Do it right the first time



Posted By: kgerry
Date Posted: July 13, 2004 at 1:29 PM
with OnStar use a GMOS-01 and without use a GMRC-01   it's not a Bose system is it? there is a separate interface for that situation

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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer

Owner/Installer
Classic Car Audio
since 1979


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