72 GMC wiring harnesses help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72 k15 · 01-26-2019, 10:14 PM

I am doing a LS swap on my 72 and am going to run a stand alone harness for that,but I do not know who to go with for the ignition brakes cab lights blinkers front lights side lights ect. I wont have to buy the engine wiring harness im guessing then? Or should I run a universal harness? what would be easier?

**Sheepdip** · 01-26-2019, 11:00 PM

Call these guys and see what all it includes
https://www.wiringspecialties.com/ls1wihaforch5.html

72 k15 · 01-27-2019, 12:10 AM

Quote:

Originally Posted by Sheepdip

Call these guys and see what all it includes
https://www.wiringspecialties.com/ls1wihaforch5.html

Looks like just engine harness to me. Thanks

Andy4639 · 01-27-2019, 10:15 AM

If your going to use a stand alone your truck harness you have now will be what you use it has nothing to do with the LS swap.
The stand alone should come with a hot 12 volt to tie into the switch and a ground the rest is in the stand alone yours in the truck want be changed at all.

72 k15 · 01-27-2019, 09:29 PM

Quote:

Originally Posted by Andy4639

If your going to use a stand alone your truck harness you have now will be what you use it has nothing to do with the LS swap.
The stand alone should come with a hot 12 volt to tie into the switch and a ground the rest is in the stand alone yours in the truck want be changed at all.

So just buy a normal harness for my truck and wire the ls harness up to the hot key switch and be good to go? Who makes the best harnesses?

Andy4639 · 01-28-2019, 12:48 AM

Quote:

Originally Posted by 72 k15

So just buy a normal harness for my truck and wire the ls harness up to the hot key switch and be good to go? Who makes the best harnesses?

Yes this is correct. As far as best I can't say because I got mine with the motor and it's the only one I have used, It was part of the package.
You should post in the LSX swap section and someone can steer you to the right vendor.

http://67-72chevytrucks.com/vboard/f...prune=-1&f=206

01-26-2019, 10:14 PM	#1
72 k15 Registered User Join Date: Sep 2018 Location: Fargo Posts: 376	72 GMC wiring harnesses help I am doing a LS swap on my 72 and am going to run a stand alone harness for that,but I do not know who to go with for the ignition brakes cab lights blinkers front lights side lights ect. I wont have to buy the engine wiring harness im guessing then? Or should I run a universal harness? what would be easier?

01-26-2019, 11:00 PM	#2
Sheepdip Senior Member Join Date: Nov 2018 Location: Waterford California Posts: 2,372	Re: 72 GMC wiring harnesses help Call these guys and see what all it includes https://www.wiringspecialties.com/ls1wihaforch5.html

01-27-2019, 10:15 AM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: 72 GMC wiring harnesses help If your going to use a stand alone your truck harness you have now will be what you use it has nothing to do with the LS swap. The stand alone should come with a hot 12 volt to tie into the switch and a ground the rest is in the stand alone yours in the truck want be changed at all. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.



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