converting 90 gmc sierra to power
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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=127679
Printed Date: July 14, 2025 at 9:32 AM
Topic: converting 90 gmc sierra to power
Posted By: dukesrebelyell
Subject: converting 90 gmc sierra to power
Date Posted: June 19, 2011 at 4:00 PM
i am redoing a few things on my truck, i want to switch the doors from manual to power doors. i bought power doors that are in fairly decent shape since my old doors had been broken into a few times the handle cutout was bent on both sides. anyway, does anyone have an easy diagram for the all the new wiring that needs to be installed.
Replies:
Posted By: howie ll
Date Posted: June 19, 2011 at 4:57 PM
Without knowing fully, you will possibly need a Body Control Module for the locks and windows = $100s.
Your best bet would be to ADD actuators and the dedicated relay from say Spal USA unless you can wire the existing locks to the dedicated Spal relay.
As for the windows go to your local library and ask to look at the service manuals for that year, or on-line or a Mitchells guide.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
Posted By: dukesrebelyell
Date Posted: June 19, 2011 at 9:19 PM
well, i have the inner doors from the manual doors in there right now while im waiting for the time to get the power inner doors installed. the inner doors were working when i pulled them off of the other truck. im looking for the wiring diagram to follow to get the power wired into the truck that is totally manual.
Posted By: howie ll
Date Posted: June 20, 2011 at 4:04 AM
I think you missed my point about a dedicated aftermarket lock relay in the vehicle, if your original doors had no locks or windows how do you intend to control the locks? Your vehicle won't have any locking electrics, power relay wiring to passenger doors etc.
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Amateurs assume, don't test and have problems; pros test first. I am not a free install service.
Read the installation manual, do a search here or online for your vehicle wiring before posting.
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