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

LS3 -> 58X or 24X?

Thread Tools
 
Search this Thread
 
Old Nov 23, 2015 | 10:11 PM
  #1  
ewingr's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Sep 2005
Posts: 618
Likes: 3
Default LS3 -> 58X or 24X?

I've been looking at harnesses at a couple different vendors. ONe lists LS3 under 58X and the other lists it under 24X.

I have the crate LS3 / 430 engine from Jegs.

Not sure what else I need to know in order to order all the stuff I need. I know I need a harness, ECM, Pedal, drive by wire.

Probably some type of MAF.

Do I need a TAC module for Cruise control stuff? Seems when I look at those, they are for older cars than this LS3.


As you can probably tell, I'm pretty green.

Last edited by ewingr; Nov 23, 2015 at 10:20 PM.
Reply
Old Nov 23, 2015 | 10:31 PM
  #2  
SS69LS1's Avatar
On The Tree
iTrader: (108)
 
Joined: Jul 2006
Posts: 194
Likes: 3
From: Pensacola, FL
Default

All the GM crate LS3's are 58X. I am not running a TAC on my 58x LS2. I believe they were only used on the older DBW using the 411 ecm with green/blue plugs. On the harness, talk to John with Modern Vintage Systems 317 224-6689

Scott
Reply
Old Nov 24, 2015 | 08:39 AM
  #3  
ewingr's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Sep 2005
Posts: 618
Likes: 3
Default

Thanks
Reply
Old Nov 25, 2015 | 02:17 PM
  #4  
Project GatTagO's Avatar
TECH Senior Member
20 Year Member
Liked
Loved
Top Answer: 1
iTrader: (7)
 
Joined: Mar 2003
Posts: 10,615
Likes: 1,883
From: Little Austin
Default

Roger,

If you are going to buy a GM LS3 430/480/525 HP versions, GMPP sells matching harness and ECU kits. Plug and play and already tuned.

All Gen IV engines are 58 tooth and the DBW does not use a TAC module. Also, all Gen IV pedals are interchangeable (stay away from GTO pedals).

Andrew
Reply
Old Nov 29, 2015 | 08:44 AM
  #5  
ewingr's Avatar
Thread Starter
TECH Enthusiast
 
Joined: Sep 2005
Posts: 618
Likes: 3
Default

Thanks.
Reply




All times are GMT -5. The time now is 10:06 PM.

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