LS swap fuse box location - The 1947 - Present Chevrolet & GMC Truck Message Board Network

BigRed76 · 09-15-2013, 01:56 PM

I'm about ready for the 5.3 swap into my '71 and I'm just curious about where you guys have put the fuse box for the engine wiring harness. I was thinking about putting it up in the left front by the left headlight, but now I'm second guessing that idea. Any ideas or pictures would be great. Thanks.

**truckdude239** · 09-15-2013, 03:49 PM

heres where i mounted mine

67 chevelle · 09-15-2013, 04:50 PM

thats where I put mine right behind the battery , moved it over there so I could keep the stock air cleaner from the 08 sierra doner

TigerDMD · 09-15-2013, 06:08 PM

Mines there too.

Posted via Mobile Device

BigRed76 · 09-18-2013, 02:49 PM

I think I'm going to go ahead and mount mine up on the top of the left wheel well. I noticed that during hard rain I get water up behind the left headlight so probably not such a good idea to put my fuse box there. Thanks for your input guys

BigRed76 · 09-21-2013, 06:46 PM

Another question...What have you guys been doing for a switched ignition source for the engine fuse box? I've been reading that on my '71 I should not use the original coil wire since it has a built in resistor...even though I used it back when I did the HEI conversion.

**truckdude239** · 09-21-2013, 08:52 PM

Well i rewired my truck and the resistor was taken out and replaced with a n8rmal wire for hei so i used that

BigRed76 · 09-21-2013, 09:25 PM

Quote:

Originally Posted by truckdude239

Well i rewired my truck and the resistor was taken out and replaced with a n8rmal wire for hei so i used that

So I can just run a new wire from that same terminal at the firewall to eliminate the resistor?
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iamoscar · 09-22-2013, 12:42 PM

I am looking into a swap like this and I was under the understanding that you only need a few fuses instead of the whole box.

Is this not the case for an ls swap?

Thanks for your input
Posted via Mobile Device

Andy4639 · 09-22-2013, 01:41 PM

This is what came with my stuff. Complete wiring harness done.
I'm not 100% sure this is all u need but it's what came back after the harness was done for the install.

U probably already know this but just thought I would add it.
LSx motor swap link.

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

iamoscar · 09-22-2013, 01:44 PM

Yep.thats what I'm talking about. I'll do the harness myself though. I like the Clean And clutter free look.
I guess I need to start a build thread. Its a 68 lwb cut to a swb
Posted via Mobile Device

BigRed76 · 09-22-2013, 02:19 PM

Quote:

Originally Posted by iamoscar

I am looking into a swap like this and I was under the understanding that you only need a few fuses instead of the whole box.

Is this not the case for an ls swap?

Thanks for your input
Posted via Mobile Device

You are correct, I'm using an aftermarket fuse box that is designed for ls swaps. It includes relays for ignition, starter, and electric fans, and then fuses for the engine and a/c stuff if needed. But this fuse box still has to be wired to the truck for power.
Posted via Mobile Device

NastyBuzzard · 05-09-2014, 12:02 PM

I know this is digging up an old thread. But I am wanting to remove the entire harness out of a 01 Silverado and swap it in my 87 V1500. I want to bring over everything I can. I plan to take fuel tank, steering column, instrument cluster, rearend, radiator, pretty much everything. I want to use the 01 harness to control my lights, pw, pwdl, everything and even use security system with key fob. Anyone have any insight on this? I have an entire donor truck minus door wiring and bed wiring.

09-15-2013, 01:56 PM	#1
BigRed76 Registered User Join Date: Jan 2010 Location: Loveland, CO Posts: 1,921	LS swap fuse box location I'm about ready for the 5.3 swap into my '71 and I'm just curious about where you guys have put the fuse box for the engine wiring harness. I was thinking about putting it up in the left front by the left headlight, but now I'm second guessing that idea. Any ideas or pictures would be great. Thanks. __________________ Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB

09-15-2013, 03:49 PM	#2
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: LS swap fuse box location heres where i mounted mine Attached Images __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

09-15-2013, 04:50 PM	#3
67 chevelle Registered User Join Date: May 2013 Location: WEST PALM FLORIDA Posts: 1,174	Re: LS swap fuse box location thats where I put mine right behind the battery , moved it over there so I could keep the stock air cleaner from the 08 sierra doner

09-15-2013, 06:08 PM	#4
TigerDMD Registered User Join Date: Feb 2011 Location: Laurens, SC Posts: 182	Re: LS swap fuse box location Mines there too. Posted via Mobile Device __________________ http://i358.photobucket.com/albums/o...0/DSC02997.jpg

09-18-2013, 02:49 PM	#5
BigRed76 Registered User Join Date: Jan 2010 Location: Loveland, CO Posts: 1,921	Re: LS swap fuse box location I think I'm going to go ahead and mount mine up on the top of the left wheel well. I noticed that during hard rain I get water up behind the left headlight so probably not such a good idea to put my fuse box there. Thanks for your input guys __________________ Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB

09-21-2013, 06:46 PM	#6
BigRed76 Registered User Join Date: Jan 2010 Location: Loveland, CO Posts: 1,921	Re: LS swap fuse box location Another question...What have you guys been doing for a switched ignition source for the engine fuse box? I've been reading that on my '71 I should not use the original coil wire since it has a built in resistor...even though I used it back when I did the HEI conversion. __________________ Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB

09-21-2013, 08:52 PM	#7
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: LS swap fuse box location Well i rewired my truck and the resistor was taken out and replaced with a n8rmal wire for hei so i used that __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

09-22-2013, 12:42 PM	#9
iamoscar Registered User Join Date: Apr 2013 Location: Wylie, TX Posts: 11	Re: LS swap fuse box location I am looking into a swap like this and I was under the understanding that you only need a few fuses instead of the whole box. Is this not the case for an ls swap? Thanks for your input Posted via Mobile Device

09-22-2013, 01:41 PM	#10
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: LS swap fuse box location This is what came with my stuff. Complete wiring harness done. I'm not 100% sure this is all u need but it's what came back after the harness was done for the install. U probably already know this but just thought I would add it. LSx motor swap link. http://67-72chevytrucks.com/vboard/f...prune=-1&f=206 Attached Images __________________ 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. Last edited by Andy4639; 09-22-2013 at 01:46 PM.

09-22-2013, 01:44 PM	#11
iamoscar Registered User Join Date: Apr 2013 Location: Wylie, TX Posts: 11	Re: LS swap fuse box location Yep.thats what I'm talking about. I'll do the harness myself though. I like the Clean And clutter free look. I guess I need to start a build thread. Its a 68 lwb cut to a swb Posted via Mobile Device Last edited by iamoscar; 09-22-2013 at 02:08 PM.

05-09-2014, 12:02 PM	#13
NastyBuzzard Registered User Join Date: Oct 2013 Location: Saluda, SC Posts: 1,276	Re: LS swap fuse box location I know this is digging up an old thread. But I am wanting to remove the entire harness out of a 01 Silverado and swap it in my 87 V1500. I want to bring over everything I can. I plan to take fuel tank, steering column, instrument cluster, rearend, radiator, pretty much everything. I want to use the 01 harness to control my lights, pw, pwdl, everything and even use security system with key fob. Anyone have any insight on this? I have an entire donor truck minus door wiring and bed wiring.



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