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Old March 12th, 2021, 02:05 PM
RangerRex RangerRex is offline
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Join Date: Dec 2019
Location: Fort Worth, TX
Truck: 1963 GMC 1/2 ton 305e V6
Age: 47
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Default Re: Headlight harness for 1963 GMC truck

Ken,
Thanks for your reply. The LMC part number for the Heavy Duty headlight harness for a 4-bulb GMC headlights is 36-3581. I got the wiring diagram from 6066 GMC club forum. The picture of headlight harness came from a picture American Autowire had on their website. I was looking at their site to see if they had harness and they had that pic that matched what I got from LMC, so I just used that to snap pic. The original wiring that is on the truck now, has the connector at the firewall, that runs the high and low beam wire to the grille and then also has the 3 wires that run over to the air filter that connects to the 3 wire connector. I can send pictures of that if would help. Thank you!


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