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

Any difference

Thread Tools
 
Search this Thread
 
Old Dec 7, 2022 | 02:59 PM
  #1  
signguy62's Avatar
Thread Starter
Teching In
 
Joined: Jun 2014
Posts: 13
Likes: 0
Default Any difference

I swapped out a 4.3l for a 5.3l in my Silverado.
5.3l didn't come with a harness or ECM. So I'm on the hunt for a harness and ECM.
the Silverado is 4wd. I'm going GenIII DBC.
Are there and differences between 2wd and 4wd harnesses aside from maybe a connection for the 4wd indicator on the dash?
Any assistance would be greatly appreciated.
Reply
Old Dec 7, 2022 | 04:39 PM
  #2  
NCDEERE's Avatar
Launching!
5 Year Member
Photoriffic
Liked
Loved
iTrader: (1)
 
Joined: Mar 2018
Posts: 236
Likes: 55
From: Chocowinity NC
Default

I used a 4X4 harness. LS1swap shows you which wires to pair out if you don't need them. Its only a few wires extra.
Reply
Old Dec 7, 2022 | 06:27 PM
  #3  
jetech's Avatar
TECH Fanatic
Veteran: Air Force
5 Year Member
Liked
Community Favorite
 
Joined: Jan 2018
Posts: 1,250
Likes: 239
From: Dade City, Fl.
Default

Make a trip to the local pick and pull auto salvage a find a harness/pcm from a 4wd silverado. I think the output speed sensor is located differently on the 4wd. I think it's on the tail end of the transfer case so the harness will be different
Reply
Old Dec 7, 2022 | 07:28 PM
  #4  
NCDEERE's Avatar
Launching!
5 Year Member
Photoriffic
Liked
Loved
iTrader: (1)
 
Joined: Mar 2018
Posts: 236
Likes: 55
From: Chocowinity NC
Default

Sure they are different but they will easily work.
Reply
Old Dec 8, 2022 | 10:38 AM
  #5  
signguy62's Avatar
Thread Starter
Teching In
 
Joined: Jun 2014
Posts: 13
Likes: 0
Default

Originally Posted by NCDEERE
I used a 4X4 harness. LS1swap shows you which wires to pair out if you don't need them. Its only a few wires extra.
Yeah, I understand finding a 4wd harness would make life easier. But if I can't, are there any major differences between 2 and 4wd harnesses. Thats what i need to know.
Thanks
Reply
Old Dec 8, 2022 | 10:40 AM
  #6  
signguy62's Avatar
Thread Starter
Teching In
 
Joined: Jun 2014
Posts: 13
Likes: 0
Default

Originally Posted by NCDEERE
Sure they are different but they will easily work.
Can you explain? I'm trying to identify the noticeable differences between the two.
Thanks
Reply
Old Dec 8, 2022 | 11:08 AM
  #7  
NCDEERE's Avatar
Launching!
5 Year Member
Photoriffic
Liked
Loved
iTrader: (1)
 
Joined: Mar 2018
Posts: 236
Likes: 55
From: Chocowinity NC
Default

The only differences I recall was the transfer case wiring for the shift motor and 4X4 indicators. Go over to ls1swap and he has the harness information including a list of every wire in the harness.
Reply




All times are GMT -5. The time now is 03:32 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