LS SWAPS: Wiring Harness and Wiring Guide

Primary wire is typically an 18-gauge wire and is the most common wire found in wiring harnesses. The larger wires that feed heavy-draw circuits are typically 14- to 12-gauge. The wire in Painless Performance kits runs a little larger than the standard; the primary wires are 16-gauge, with 12-gauge for heavy-draw items such as the headlights.

Description. Modification of Stock Engine Harness. If you’ve acquired an LT1, LSx Gen 3 or 4, or Gen 5 (LT1, L83, L86) style engine that came with a wiring harness on it, and you feel that the length of the harness to the ECU, and the look of the harness will work fine for your project, then we can simply modify it to be a stand alone engine management harness.

1992 to 1997 LT1 5.7 and L99 4.3 Wiring Harness Info Includes: Camaro/Firebird, Corvette, Caprice/Impala, Roadmaster. 1996 to 1999 Vortec 4.3/5.0/5.7/7.4L Harness Schematics and INFO.. 1999 to 2007 Vortec 4.8/5.3/6.0 Harness Wiring Info TONS OF INFO HERE, Please Read all the pages linked.. 2007 to 2009 Vortec 4.8/5.3/6.0/6.2 Harness Information - New Harness Modification INFO added 11/6/2012!

GM Wiring Modification of LS and LT Wiring Systems. You must have the harness off of the donor LT1, TPI, LS1 engine, undamaged. We re-configure and tail out what needs to be used, to run the engine and transmission correctly, at full power . This is a very complete service we offer, the wire harness also will look new.

Custom Standalone Harness We will convert your 15+ bulky stock wiring harness to a like new standalone 3 wire harness. Custom ls swap harness for you custom ls vehicle Full service shop located in Ontario, California Harness •Will be ready to run right out of the box. •We remove all bulk wiring and only leave what YOUR Engine Requires.

Focus on one part of the wiring harness at a time and then tape it up, put it to the side, etc. . In this video I show how you can convert a factory Silverado wiring harness to be used in a LS ...

How To: LS Swap Engine Harness Modification Part 1. This LS swap guide is from the perspective of a 2003 5.3 and 4l60e out of a Tahoe with the stock wiring harness and computer, but not using any of the stock fuse boxes or relays. The procedure should be similar for all LS swaps.

Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. These harnesses include the Gen II LT1/LT4, Gen III (24x) LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines.

BP offers two engine management fuse/relay panels. Both products will cover everything from an LT1, 5.7 Vortec, LS1, LS2, LS3, LSA, LS9, 08-14 Vortec engines, and the 99-07 4.8, 5.3, and 6.0-liter engines and like all BP Automotive products, these fuse/relay panels use OEM quality TXL wire and quality Delphi components.

It seems for many people that the scariest part of the modern engine swap is the wiring harness. When you are doing a build with the LS family of GM engines, the idea is to end up with a ...