Ls3 Wiring Harness

We hand build every harness to fit exactly what your project needs and they actually form fit on the engine to make your wiring look and perform perfectly.

Ls3 wiring harness.

Available options transmission electric fans air conditioning and upgraded braided loom. No cores or modifications needed. 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. Made in usa with a start up guarantee.

Please call for custom ecm and or fuse box location extra length. Actual product may vary. Our stock harnesses are 4 feet from the rear of engine passenger side. 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 isr 350z lsx swap parts ls3 gen iv 58x dbw wiring harnesses lsx o2 sensors extensions.

Engine harness for ls2 ls3 vortec 58 tooth engine shown. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. The are built with new gm delphi connector and high temperature wires. The wiring harness lengths are designed so you can mount the ecm under the dash.

It is really that simple with the factory fit harnesses from bp automotive. They are completely plug and plays with only 4 wires switched power constant power and ground connections. 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. This includes the lt1 ls1 ls2 ls3 ls7 l99 l76 l77 l92 l98 lm7 lm4 lsa ls9 l83 and the new gen v lt1.

Speartech is your ls lt wiring harness swap specialist. We also specialize in ls and lt swap standalone harnesses. We use the highest quality wire brand new oem connectors weatherproof fuse and relay box. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions.

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 primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights. Speartech also provides ecm programming including e38 e67 e40 e92 ls lt engine wiring harness reworks and conversion adapters and programming. Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses.

Brand new standalone ls3 l99 swap drive by wire wiring harness. Please call for harness package with programmed computer. All psi harnesses are made in the usa.