2003 grand prix gt

Printed From: the12volt.com
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=116680
Printed Date: May 04, 2025 at 2:46 AM

Topic: 2003 grand prix gt

Posted By: yungen2003
Subject: 2003 grand prix gt
Date Posted: October 03, 2009 at 12:57 AM

Needing some help, so here's the deal. Tommorow I have an install to do for one of my buddies. Its a 2003 Grand Prix GT. I looked Didn't seem to see any factory amp. Still stock head unit. But it does have a factory alarm. On the 12 volt you have 2002 and 2004 gt but no 2003 grand prix's. I need to know the colors for the stereo. If anyone can get these posted ASAP it would be muchly appreciated.

Replies:

Posted By: howie ll
Date Posted: October 03, 2009 at 3:04 AM

Look at the 02 and 04, if they are the same, then the 03 will be the same. If not use both as a crib.

Posted By: tommy...
Date Posted: October 03, 2009 at 9:37 AM

Battery	ORANGE	(+)	RADIO HARNESS
Accesory	YELLOW	(+)	RADIO HARNESS
Ground	BLACK	(-)	RADIO HARNESS
Illumination	BROWN	(+)	RADIO HARNESS
Dimmer	GRAY	(+)	RADIO HARNESS
LF Speaker (+)	TAN
LF Speaker (-)	GRAY
RF Speaker (+)	LIGHT GREEN
RF Speaker (-)	DARK GREEN
LR Speaker (+)	BROWN
LR Speaker (-)	YELLOW
RR Speaker (+)	DARK BLUE
RR Speaker (-)	LIGHT BLUE
Steering Cntrls	YES
Speed Cntrl	YES
Radio Security	YES

THIS VEHICLE MAY BE EQUIPPED WITH OPTIONAL ONSTAR® TELEMATICS EQUIPMENT. USE AN APPROPRIATE INTEGRATION HARNESS OR INSTALLATION PROCEDURE TO ENSURE PROPER FUNCTION OF THIS EQUIPMENT.

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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

Posted By: yungen2003
Date Posted: October 03, 2009 at 12:54 PM

Is there any need to bypass the radio security? will it cause any problems?

Posted By: tommy...
Date Posted: October 03, 2009 at 9:07 PM

yungen2003 wrote:

Is there any need to bypass the radio security? will it cause any problems?

You wont need to "bypass" anything to install the new radio(as far as the radio security)...Radio Security usually means that when you plug the factory radio back in...You need to enter a code using the buttons on the factory radio to unlock/be able to use factory radio...Why do you need the factory wire colors...? Are you going to use a wiring harness for the install...? What im getting at...is i hope there will be no cutting of any wires in the car...?...right...!?Here are the wiring harness options from Metra...

Search Results Click part for more detailed product information.
	Metra Electronics Corp. 70-1858 General Motors 1988-Up - Into Car 21-pin More Details
	Metra Electronics Corp. 70-2054 Factory amplifier bypass harness More Details
	Metra Electronics Corp. GMOS-11 Onstar interface with or without factory amplifiers. More Details

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M.E.C.P & First-Class
Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!