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03’ gmc sierra 2500 hd

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=13253
Printed Date: November 05, 2025 at 2:43 PM


Topic: 03’ gmc sierra 2500 hd

Posted By: hernandez831
Subject: 03’ gmc sierra 2500 hd
Date Posted: May 06, 2003 at 8:43 PM

Hello,

I am installing a (Valet 551t) on this gmc truck but i cannot seem to find the OEM wiring. can some one help me out with this one.

Thanks

hernandez831




Replies:

Posted By: draasch
Date Posted: May 06, 2003 at 10:47 PM
double check the wire with a meter....

Make:   GMC
Model: Sierra/Fullsize P/U
Year:    2001-02
This Database Was Last Updated On:    10/7/02
Index #: 2165


Alarm
Constant 12 volts RED & RED / WHITE IGNITION SWITCH HARNESS
Ignition 12 volts PINK IGNITION SWITCH HARNESS
Starter YELLOW IGNITION SWITCH HARNESS
Dome Light TAN(DR) & GRAY/BLACK PS (-) AT B.C.M. UNDER DRIVERS DASH *
Trunk Pin Switch N/A
Parking Lamp L BLUE (+) AT HEADLIGHT SWITCH
Power Lock L BLUE AT B.C.M. BELOW THE STEERING COLUMN
Power Unlock WHITE #202

* TAN (-) In Connector On The Right Covers Driver Door Only. GRAY/BLACK (-) Connector On The Middle Cover Passengers Door. Diode Isolation Needed, Cathode (Band) Side Of Diode Faces OEM Wires. #202 - See Positive Pulse Door Lock Diagram. (2 Door w/Keyless or 4 Door)

Tach Signal WHITE FOR THE V-8 AT THE P.C.M. #238
Ignition #2 WHITE IGNITION SWITCH HARNESS #216
Ignition #3 ORANGE IGNITION SWITCH HARNESS (HEAT/AC)
Accessory BROWN IGNITION SWITCH HARNESS
Neutral Safety NOT GROUNDING TYPE - OEM SWITCH OPENS STARTER CIRCUIT
Brake Light WHITE (+) AT SWITCH ABOVE BRAKE PEDAL
Reverse Light L GREEN (+) DRIVERS KICK PANEL
Rear Window Defrost N/A


* Power Control Module Located At The Left Front Of The Engine Compartment Pin 10 of the 80 pin connector. WHITE-For The V-6 At The Coil On Top Of The Engine. #216- See G.M. Extra Ignition Diagram. #238 - See G.M. Passlock II Diagram.

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Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt




Posted By: hernandez831
Date Posted: May 07, 2003 at 7:44 AM

Thanks alot for all the help. and i sure will double check each wire with a meter.

Thanks

Jose Hernandez




Posted By: x6369x
Date Posted: May 12, 2003 at 11:13 PM
The 03's are different than the 00 - 02's. You'll need a module (I think it's the 456G, but I may be wrong), to interface w/ the 03's new electrical bus system.

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Friends Don't Let Friends Bump Stock.



Posted By: Ronald Mark
Date Posted: May 14, 2003 at 8:00 AM
I have an oem diagram, tell me what circuits you need...


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