Silverado ’99 Wires at BCM
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=18097
Printed Date: July 16, 2025 at 8:33 AM
Topic: Silverado ’99 Wires at BCM
Posted By: captntech
Subject: Silverado ’99 Wires at BCM
Date Posted: August 26, 2003 at 10:15 AM
Getting ready to install two new Crimestopper RS900s, one in an '03 Trailblazer and one in a '99 Silverado. The Trailblazer should be a no-brainer as I'm using the PLDATA and GMDL1 modules, so it should handle disarm/rearm automatically (or so the literature says). Now, on the Silverado, there's a light green disarm wire on the BCM, a light blue for lock, and a white for unlock. The BCM has three plugs, purple on left, blue in middle, and brown on right. Has anyone identified these exact wires in these plugs? A pin location would be great! There are multiple light blue and white wires as well as several green wires that appear more light than dark. Your endless supply of wisdom is greatly appreciated.
Replies:
Posted By: anonymous
Date Posted: August 26, 2003 at 2:03 PM
The white and blue wires for lock and unlock are in the plug on the left. The positions are A3 and A4. The A row is the bottom row. The disarm wire is in the plug farthest to the right. It's in position B3. Your wire colours are correct.
Happy meteringAnonymous
Posted By: captntech
Date Posted: August 26, 2003 at 2:12 PM
Outstanding! Thanks - just saved me an hour of probing.
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