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Need 2004 GMC Sierra wiring info

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=32478
Printed Date: July 22, 2025 at 11:41 AM


Topic: Need 2004 GMC Sierra wiring info

Posted By: CutDog504
Subject: Need 2004 GMC Sierra wiring info
Date Posted: May 20, 2004 at 11:09 PM

I need wiring info for a 2004 GMC Sierra 4 door Crewcab 2500HD with a Duramax diesel engine. Also, does anyone know if installing an alarm with remote start on this truck will void the warranty?



Replies:

Posted By: Velocity Motors
Date Posted: May 20, 2004 at 11:32 PM

12volts
posted_image
red (x2)
posted_image
+
posted_image
ignition harness
posted_image

posted_image
Starteryellow + ignition harness
Second StarterN/A
Ignitionpink + ignition harness
Second Ignitionwhite + ignition harness posted_image
Third IgnitionN/A
Accessoryorange + ignition harness
Second Accessorybrown + ignition harness
Keysenselt. green - ignition harness
Power Lockuse Directed module 456G posted_image
Power Unlocksee power lock
Lock Motorgray driver door module in door
Unlock Motortan driver door module in door
Parking Lights+do not use
Parking Lights-gray/black - brn plug, pin B2 @ BCM posted_image
Hazardswhite - steering column, 5 pin plug
Turn Signal(L)green + steering column, 5 pin plug
Turn Signal(R)lt. green + steering column, 5 pin plug
Reverse Lightlt. green + blk plug, pin F @ BCM posted_image
Door Triggergry/blk (L), blk/wht (R) - each door module in door posted_image
Dome Supervisiongray/black + BCM, black plug, pin E posted_image
Trunk/Hatch PinN/A
Hood PinN/A
Trunk/Hatch ReleaseN/A
Power Sliding DoorN/A
Factory Alarm Armarms with lock
Factory Alarm Disarmlt. green - driver door module in door
Disarm No Unlocksee factory alarm disarm
Tachometerwhite ac instrument cluster or PCM posted_image
Wait to startblue - instrument cluster or PCM posted_image
Brake Wirewhite + brake pedal switch
Parking Brakelt. blue - lt. blu plug, pin A7 @ BCM posted_image

Horn Black (-) at BCM in Gray plug.

Use a 433 MHz module to avoid poor range.

2nd Ignition must be connected for remote start or Check Engine light will turn on and driveability problems will be experienced, possibly resulting in serious transmisssion damage.



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





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