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99-2000 gmc siarra tac

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=18600
Printed Date: August 30, 2025 at 7:28 AM


Topic: 99-2000 gmc siarra tac

Posted By: amador
Subject: 99-2000 gmc siarra tac
Date Posted: September 07, 2003 at 1:36 AM

need help i am working on a 99/2000 gmc siarra v8 thier are 8 coils i need to know the color of the tac wire please help asap thanks



Replies:

Posted By: Velocity Motors
Date Posted: September 07, 2003 at 7:21 AM

TACHOMETER|white *5            |   |ECM *3

*3 ECM is located near the battery, down low, between the fender and the fan under the black plastic cover. On the 4.3L, the tach wire is at pin 20 in the connector labeled red, and VSS wire is at pin 3 in the connector labeled black. On the 4.8L, 5.3L, and 6.0L, the tach wire is located at pin 10 in the red connector, and VSS wire is located in pin 50 of the red connector.



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


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