2003 silverado wiring diagram

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=7759
Printed Date: July 22, 2025 at 7:06 AM

Topic: 2003 silverado wiring diagram

Posted By: holeshot
Subject: 2003 silverado wiring diagram
Date Posted: January 06, 2003 at 6:29 PM

hi alll i just bought a 2003 silverado crew cab lt. i was looking for the wiring diagram for installing the remote start

Ive found most of the wiring except for the wait to start light and tach wiring. my other problem is the door triggers and locks.

Any help would be greatly appreciated

thanks all

Tony

Replies:

Posted By: electrotech
Date Posted: January 06, 2003 at 8:20 PM

you should have specified if it was a diesel

Posted By: electrotech
Date Posted: January 06, 2003 at 8:28 PM

if this vehicle is a 6.6 diesel the wire for the glow plug light can be found behind the instrument panel
and is blue with a negative signal.
most remote starters accept his input signal.

if the vehicle is equipped with factory keyless the doorlock/unlock wires will be positive
these are normally
lock----light blue drivers kick panel
unlock----white drivers kick

John

Posted By: holeshot
Date Posted: January 06, 2003 at 8:52 PM

Im sorry yes it is a diesel here are the specs its a 3500 crew cab dually LT It has it all. Im also looking for the tach wire, and any info about the radio can i just take it out i really dont care about the door chime. Thanks again for any help.

Tony

Posted By: Velocity Motors
Date Posted: January 06, 2003 at 11:44 PM

PCM, blue plug, pin 52, lt. Blue (+). This is the output from the glow plug relay. Here is some additional info but there is conflicting information on this that has not been validated

found wait to start behind the cluster, dk. Blue (-) there is no wait to start light on this one
it doesnt need to wait.

This information was from a previous post from another member, so please verify this with a DMM.

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA