Ls3 Wiring Harness Modification

We re configure and tail out what needs to be used to run the engine and transmission correctly at full power.

Ls3 wiring harness modification. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. Ls1 vortec gen iii 24x wiring harnesses lsx coil pack harness hp tuners ls pcm startup tune flash service. Brand new standalone ls3 l99 swap drive by wire wiring harness. We remove all bulk wiring and only leave what your engine requires.

The 6 2l ls3 6l80e standalone wiring harness is designed to let you put the 2008 2014 ls3 6 2l engine in just about any vehicle. The wire in painless performance kits runs a little larger than the standard. All of these options from re pinning your original wiring harness to purchasing a complete standalone operating system come with different individual costs and level of complexity. Speartech is your ls lt wiring harness swap specialist.

We offer ls lt swap harnesses for all gen 3 4 and 5 ls lt engines including ls1 ls2 ls3 ls6 ls7 lsa ls9 gen 5 v8 lt1 lt4 lq4 lq6 l99 vortec variants dod vvt afm. All psi harnesses are made in the usa. Speartech also provides ecm programming including e38 e67 e40 e92 ls lt engine wiring harness reworks and conversion adapters and programming. This is a very complete service we offer the wire.

Made in usa with a start up guarantee. No cores or modifications needed. They are completely plug and plays with only 4 wires switched power constant power and ground connections. The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights.

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. 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. Gm wiring modification of ls and lt wiring systems you must have the harness off of the donor lt1 tpi ls1 engine undamaged. Ls2 ls3 gen iv dbc wiring harnesses lsx injector adapters sikky lsx swap mount kits ls2 gen iv 24x dbw wiring harnesses lsx gen iii to iv sensor conversion adapters.

Here we learn how to modify the original equipment l99 or ls3 e38 ecm engine harness to work with a t56 six speed transmission ending in a three wire hook up. Hopefully you can find guidance or at least some clarity in what options are available and make a decision that best fits your application and budget. Ls wiring harnesses swap kits. Custom standalone harness we will convert your 15 bulky stock wiring harness to a like new standalone 3 wire harness.

The wiring harness lengths are designed so you can mount the ecm under the dash.