2000 GMC Sierra Power Lock

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=145391
Printed Date: May 13, 2025 at 10:01 PM

Topic: 2000 GMC Sierra Power Lock

Posted By: scottmorris
Subject: 2000 GMC Sierra Power Lock
Date Posted: May 02, 2019 at 1:40 PM

Hello, I have a 2000 GMC Sierra and I recently installed a viper 5105v rs/alarm kit. The problem I am having however is with the door locks. I had to install two aftermarket lock actuators, as my doors are manual. I bought the 451m relay but had no luck getting it to work with my application. I later bought two 5-pin relays and wired them up and got the locks to function, but they lock when commanded unlock and vice-versa. I cannot for the life of me figure out how to fix this issue. I’ve tried reversing polarity on the driver side master lock, but the locks would only have one function if I did so. I have triple checked my wiring on the relays, but have came up short each time. Help me please!!!

Replies:

Posted By: geepherder
Date Posted: May 02, 2019 at 3:42 PM

Swap the lock and unlock wires on the Viper.

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My ex once told me I have a perfect face for radio.

Posted By: scottmorris
Date Posted: May 02, 2019 at 4:28 PM

geepherder wrote:

Swap the lock and unlock wires on the Viper.

how exactly would I go about doing this?

Posted By: i am an idiot
Date Posted: May 02, 2019 at 9:28 PM

What color are the lock and unlock wires of the alarm system? Remove the lock wire and connect it to the other relay. Put the unlock wire on the relay you took the other wire from.

Posted By: geepherder
Date Posted: May 02, 2019 at 10:02 PM

You could cut the lock and unlock wires and connect blue to green and green to blue.

Or you could change them at the relays as suggested above. Either way it accomplishes the same thing.

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My ex once told me I have a perfect face for radio.

Posted By: scottmorris
Date Posted: May 02, 2019 at 10:44 PM

Thanks for the replies guys. I will try this after work tomorrow and let you know the results.

Posted By: scottmorris
Date Posted: June 25, 2019 at 2:46 PM

scottmorris wrote:

Thanks for the replies guys. I will try this after work tomorrow and let you know the results.

Thanks everyone, they function as they should now.

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2000 RCSB Sierra
4.10 gears with Yukon Duragrip
Built 4L60E
Custom HP Tune by Me
Viper 5105v
Power lock and window conversion
Rockford Fosgate 300.1
2 JL Audio 12s
Custom Ported Enclosure by M