Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

DIY Harness,need wiring instructions.

Thread Tools
 
Search this Thread
 
Old Dec 10, 2012 | 05:10 PM
  #1  
ssman00's Avatar
Thread Starter
TECH Regular
iTrader: (7)
 
Joined: Feb 2006
Posts: 464
Likes: 0
From: spartanburg south carolina
Cool DIY Harness,need wiring instructions.

I have an '88 Chevy 1500 4x2 longbed daily driver(TBI). I also have complete ls6 swap with auto trans that I want to put in my truck due to gas mileage on worn out 5.7(350,000miles). I have factory wiring harness from the '01 SS automatic. Better to send off harness and pay $400 or get complete new for $700? I also need a computer,someone robbed it. I'm really wanting to do this myself and would greatly appreciate any help on this matter. I also have HPTUNERS.
Reply
Old Dec 10, 2012 | 05:51 PM
  #2  
BP Automotive's Avatar
LS1Tech Sponsor
10 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
iTrader: (3)
 
Joined: Oct 2012
Posts: 641
Likes: 2
From: Columbia, Kentucky
Default

Edited
__________________

Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491

Last edited by BP Automotive; Jan 28, 2013 at 05:10 PM.
Reply
Old Dec 10, 2012 | 06:19 PM
  #3  
stangtrader's Avatar
12 Second Club
iTrader: (2)
 
Joined: Apr 2009
Posts: 900
Likes: 0
From: PNW
Default

Pnp is a good deal imo, just ordered mine up from bill@bpautomotive
Reply
Old Dec 11, 2012 | 03:10 AM
  #4  
lowrolr's Avatar
Staging Lane
 
Joined: Nov 2012
Posts: 56
Likes: 0
Default

Hi bp automotive.. I have a 01 s blazer with 4.3 and im swapping in the typical 5.3 swap and need wiring harness. I would prefer a plug and play. The 5.3 is a genIV. Also what ecu would you suggest. Also im using same automatic trans would i need to change tcm. Thanks for your help
Reply
Old Dec 11, 2012 | 07:52 AM
  #5  
ssman00's Avatar
Thread Starter
TECH Regular
iTrader: (7)
 
Joined: Feb 2006
Posts: 464
Likes: 0
From: spartanburg south carolina
Default

AWESOME....there is an LS1 GOD. 1 Ok,how much for a computer or should I track 1 down in the junk yard and what should I get? Not sure if I saw where you mentioned that.2 Does the diy kit instructions tell me what extra wires to dispose of (on my harness theres not a bunch anyway)? 3 This truck is TBI so is it best to do upgraded intank pump or inline the best option for me (returnless if possible)?I could attach inline where factory hardline fuel filter is and run braided from there up to motor. 4 Fan wiring would be a must,dont like those silly little controllers (have had them fail before)rather let computer do that function. Where are you located? Thanks for your guidedance...
Reply
Old Dec 11, 2012 | 11:56 AM
  #6  
LS1 pwrd NOVA's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Feb 2003
Posts: 1,011
Likes: 4
From: Corpus Christi, Texas
Default

Why not do it yourself? You did the swap
Reply
Old Dec 11, 2012 | 12:05 PM
  #7  
pan58head's Avatar
Teching In
 
Joined: Apr 2011
Posts: 43
Likes: 0
Default

I second that, I got all my info from lt1swap.com(if he's reading this a big thanks). I did my harness in a sunday afternoon. I think after buying the fuse panel, ends, wire loom, cold beverage!!! I was into for under $50. I still need to send my computer to him to have the vats removed . Bob
Reply
Old Dec 11, 2012 | 12:16 PM
  #8  
Blue Knight's Avatar
11 Second Club
iTrader: (4)
 
Joined: Oct 2012
Posts: 173
Likes: 0
Default

I also followed the directions from lt1swap, worked great.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Dec 11, 2012 | 01:41 PM
  #9  
LS1 pwrd NOVA's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Feb 2003
Posts: 1,011
Likes: 4
From: Corpus Christi, Texas
Default

Doing it yourself..... Winner
Reply
Old Dec 11, 2012 | 03:41 PM
  #10  
superbean's Avatar
TECH Apprentice
 
Joined: Apr 2011
Posts: 390
Likes: 0
Default

You can do it yourself if you have an ohm meter and basic knowledge 60$ materials roughly. We also have a few forum sponsers on here that do some kickass work. Wiring is one thing you don't want to skimp on because it will leave you stranded or extremely confused down the road. I consider myself fairly tech savvy and can trace wiring really well, But time to time I still rely on our sponsers and other gear heads on this website for assistance. Good luck with the build and make sure to document it!!!

-Randy
Reply
Old Dec 11, 2012 | 04:54 PM
  #11  
ssman00's Avatar
Thread Starter
TECH Regular
iTrader: (7)
 
Joined: Feb 2006
Posts: 464
Likes: 0
From: spartanburg south carolina
Default

Thanks Randy.Every where I search for instructions,there are roadblocks because of the money side of wiring.I do have wiring experience,just not a huge billfold.I have also built a couple LS1 motors that scream....I love LS stuff...people just stingy.Lol. If I can make my first harness I will learn from there and everything in my yard will be LS powered.
Reply
Old Dec 11, 2012 | 05:59 PM
  #12  
LS1 pwrd NOVA's Avatar
TECH Fanatic
iTrader: (2)
 
Joined: Feb 2003
Posts: 1,011
Likes: 4
From: Corpus Christi, Texas
Default

I'm gonna build my own so we will all learn n help one another. Go for it as ill be in your shoes here soon.
Reply
Old Dec 11, 2012 | 08:57 PM
  #13  
BP Automotive's Avatar
LS1Tech Sponsor
10 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
iTrader: (3)
 
Joined: Oct 2012
Posts: 641
Likes: 2
From: Columbia, Kentucky
Default

Edited
__________________

Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491

Last edited by BP Automotive; Jan 28, 2013 at 05:10 PM.
Reply
Old Dec 11, 2012 | 09:16 PM
  #14  
BP Automotive's Avatar
LS1Tech Sponsor
10 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
iTrader: (3)
 
Joined: Oct 2012
Posts: 641
Likes: 2
From: Columbia, Kentucky
Default

Edited.
__________________

Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491

Last edited by BP Automotive; Jan 28, 2013 at 05:10 PM.
Reply
Old Dec 11, 2012 | 10:45 PM
  #15  
-TheBandit-'s Avatar
TECH Addict
15 Year Member
Photogenic
Liked
Loved
iTrader: (1)
 
Joined: Apr 2010
Posts: 2,816
Likes: 86
From: Instagram @chevyhotrodder
Default

BP Auto - Thanks for providing more info on your DIY kits. These seem geared toward people modifying existing harnesses.

Can you give some more detail on this?

Originally Posted by BP Automotive
5. 4 foot of control and harness supply wire.
Is this leads/pigtails coming off the fuse / relay block or is this wire for some other purpose?
Reply
Old Dec 11, 2012 | 10:55 PM
  #16  
-TheBandit-'s Avatar
TECH Addict
15 Year Member
Photogenic
Liked
Loved
iTrader: (1)
 
Joined: Apr 2010
Posts: 2,816
Likes: 86
From: Instagram @chevyhotrodder
Default

Originally Posted by BP Automotive
What is that stuff called? I'd like to find some. That looks like the same stuff that was used on the factory coil wire harness. I haven't taken apart much of my harness yet, but I expect to find more of it. It looks like that "marshmallow" stuff inside expands under heat, yes?

I'd like to find a good "kit" of GM harness colored wires in a reasonable length, maybe like 6-10ft of each common color.
Reply
Old Dec 13, 2012 | 07:25 AM
  #17  
ssman00's Avatar
Thread Starter
TECH Regular
iTrader: (7)
 
Joined: Feb 2006
Posts: 464
Likes: 0
From: spartanburg south carolina
Default

BP-Automotive.....you rock. This is exactly what I have been looking for. I would like to know if I order the $150 diy kit,how long does it take before I receive it,as in do you have to make it up or do you have the harnesses made up ready to ship? You have helped to relight my fire to get going on my project,daily driver truck. This motor is stock.I have a LS2 bored 70 over with stock crank and H beam rods with billet pistons(377ci) that is ready to put together if I can just find a deal on some stock LS3 heads and intake.
Reply
Old Dec 13, 2012 | 07:36 AM
  #18  
Jones'n's Avatar
TECH Resident
 
Joined: Jun 2004
Posts: 841
Likes: 2
From: Tampa, FL
Default

Originally Posted by BP Automotive
The cost for this COMPLETE kit is $150 Pic below (pic is of same fuse block attached to new harness)

That looks like the same kit I have seen elsewhere for $125. Are you just buying it and reselling it?
Reply
Old Dec 13, 2012 | 08:27 AM
  #19  
BP Automotive's Avatar
LS1Tech Sponsor
10 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
iTrader: (3)
 
Joined: Oct 2012
Posts: 641
Likes: 2
From: Columbia, Kentucky
Default

Edited
__________________

Standalone LS Swap Harnesses IN STOCK!
LSX, LTX Stand alone swap harnesses. S10 LSX conversion PLUG AND PLAY harnesses, 24x conversion PLUG AND PLAY harnesses. LT1 to LSX PLUG AND PLAY Harnesses.
sales@bp-automotive.com
www.bp-automotive.com
1-888-467-4491

Last edited by BP Automotive; Jan 28, 2013 at 05:11 PM.
Reply
Old Dec 13, 2012 | 08:32 AM
  #20  
Pop N Wood's Avatar
TECH Junkie
iTrader: (1)
 
Joined: May 2006
Posts: 3,402
Likes: 8
Default

GM is also the company that didn't paint the inside of Vega body panels and built millions of cars in the 60's and 70's grounding loads to body panels instead of spending the few extra bucks to run ground wires around to everything. I think the phrase "planned obsolescence" was coined with them in mind. I've worked as an engineer long enough to know that production decisions are often made by a different set of criteria than what we engineers recommend. You would be amazed why some things end up the way they do.

I agree with what you are saying and would like to complement you for sharing what is undoubtedly hard earned experience. If I was in the market for harness stuff you would be one of the guys I would look at.

But the comment "GM did it this way" only goes so far with me. Any company being run by Obama obviously made some poor choices along the way.
Reply



All times are GMT -5. The time now is 02:55 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE