2004 Silverado lock/unlock

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=31478
Printed Date: July 15, 2025 at 8:00 AM

Topic: 2004 Silverado lock/unlock

Posted By: Little Bird
Subject: 2004 Silverado lock/unlock
Date Posted: May 02, 2004 at 5:11 PM

Installing a CG 745i in my '04 Silverado LT 2500HD diesel crewcab. Everything is connected and working except the door locks. Does anyone have wiring info (color / location) for this truck? I am wanting to use driver door priority unlock. The 745i has two internal relays and the wires are listed below.

Violet - Unlock (+) or (-) Input (NO)

Blue - Unlock Output (COM)

Brown - Unlock Input (NC)

Violet / Black - Lock (+) or (-) Input (NO)

Green / Black - Lock Output (COM)

White / Black - Lock Input (NC)

Pink - Unlock #2 250mA (-) Output

Thanks in advance! Pat

Replies:

Posted By: profuse007
Date Posted: May 02, 2004 at 7:38 PM

-i think the 03-04 are similar truck. on the based model truck, the lock wire is lt. blue (-) and unlock wire is white (-). They are in the lt. blue plug at the BCM. if not based model, look at the pdf

-so the wire above youll need:
Violet - Unlock (+) or (-) Input (NO)

Blue - Unlock Output (COM)

Violet / Black - Lock (+) or (-) Input (NO)

Green / Black - Lock Output (COM)

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-look at this pdf file

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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).

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