2003 Silverado Doorlock Wires
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=23769
Printed Date: July 12, 2025 at 3:59 AM
Topic: 2003 Silverado Doorlock Wires
Posted By: dyer
Subject: 2003 Silverado Doorlock Wires
Date Posted: January 02, 2004 at 9:06 AM
Can someone tell me the doorlock wires for a 2003 silverado. It has no factory alarm or keyless entry. Due to this I don't think I tie into the databus wire. Instead do I need to find the lt. blue and white wires at the bcm?? Are they (+) tap? thanks in advance.
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Dyer
Replies:
Posted By: Teken
Date Posted: January 02, 2004 at 9:22 AM
Is this a Chevy? GMC?
Posted By: draasch
Date Posted: January 02, 2004 at 9:32 AM
Power Lock GRAY SEE TECH NOTES (BASE MODEL #201
Power Unlock TAN FOR DOOR LOCK INFO **
#201- See Nevitive Pulse Door Lock Diagram (Base Model).Lock L BLUE, Unlock WHITE Both Found At the B.C.M. Located Under Drivers Dash.
DOOR LOCKS-Due To Multiplexing,Each Front Door Is Individually Activated.This Is Accomplished By Using Two Pair of Relays Confiqured As Reversal Rest At Nothing To Control The Actuator Wires Of Each Door. GREY = LOCK,TAN = UNLOCK The Door Panel Must Be Removed To Access The Actuator Wires.To Opperate The Rear Passenger Doors- Apply A Negative Pulse to Pin #85 Of The Rear Door Lock/Unlock Relays Located Under The Driver's Dash. DATABUS: DataBus Door Lock Interface Module Is Available.
DB-GMDL-4 Simplifies Door Lock Installation <<<<is the omega part number ------------- Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt
Posted By: dyer
Date Posted: January 02, 2004 at 9:44 AM
It is a chevy silverado 2-dr.
DRAASCH....
Thanks for the post, but i'm afraid i'm a bit confused about which wires i need. Do i need to power up relays as if they were reverse polarity and tie into grey and tan wires, or are they a (-) tap on the lt. blue and white?
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Dyer
Posted By: dyer
Date Posted: January 02, 2004 at 12:46 PM
i went into the doors and found the actuator wires (tan and grey)
they read +12 when popped lock and unlock.
do i need to tap into these wires as if they were reverse polarity/actuator. Will this pop both driver and passenger doors?
Any help would be much appreciatd
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Dyer
Posted By: draasch
Date Posted: January 02, 2004 at 11:13 PM
see if you can find this part number where you live.......if not drop me a line... ------------- Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt
Posted By: chriswallace187
Date Posted: January 02, 2004 at 11:26 PM
You should be able to use the blue and white (-) trigger wires at the BCM. I did an H2 that had the same wire colors and locations, and it worked fine with those two only.
Posted By: sroth140
Date Posted: January 03, 2004 at 2:20 AM
i thought the 03 trucks needed that 456g... that should handle a lot of wiring. https://directed.com/guides/manuals/ig/accessories/N456G.pdf
Posted By: dyer
Date Posted: January 03, 2004 at 6:16 PM
sroth140.....
Most 03 silverado's do need the 456g. However, this one is the very base model, so i don't think it uses the databus for the locks.
chriswallace187....
I tested the lt. blue and white wires (same for my truck) and they didn't show any voltage change. It's strange
draasch.....
I found the actuator wires (tan and grey). They are + when locked and unlocked. Do I need to wire these up as if they were reverse polarity??
THANKS TO ALL OF YOU REPLYING ... WE ALL KNOW HOW NICE HELP CAN BE!
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Dyer
Posted By: chriswallace187
Date Posted: January 04, 2004 at 11:50 PM
Just out of curiosity, were you testing the lt. blue and white wires in the purple plug?
Posted By: dyer
Date Posted: January 04, 2004 at 11:59 PM
ummmm.....not really sure. I know that there was more thank one plug w/ those colored wires. I'm pretty sure that I checked all the colors at all the plugs at the bcm corresponding to those colors. Which plug is the right plug?? If I can get the wires at the actuator, how can I wire them up?
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Dyer
Posted By: gardnerb1
Date Posted: January 05, 2004 at 8:05 AM
my 2 cents on the DEI 456G part. check the on board diagnostics plug under the drivers side dash for a small gauge VIOLET wire. That will most likely be your databus wire and is a quick way to doorlocks, park/headlight illum, factory alarm disarm, etc. Just a note, otherwise you have to find each wire, and more work is imminent. I believe you can catch the lock/unlock either in the drivers kick panel or @ the BCM. Good luck ------------- I just saved a ton on my car insurance! 
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