Ls3 Wiring Harness

Please call for custom ecm and or fuse box location extra length.

Ls3 wiring harness.

No cores or modifications needed. The wire in painless performance kits runs a little larger than the standard. Swap specialties 24x standalone wiring harness for gm gen3 4 8 5 3 5 7 and 6 0l engines have proven to be the best harness on the market today. The wiring harness lengths are designed so you can mount the ecm under the dash.

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. Engine harness for ls2 ls3 vortec 58 tooth engine shown. We also specialize in ls and lt swap standalone harnesses. Psi standalone wiring harness har 1071 is a complete plug and play harness designed for your 2008 2015 ls3 6 2l engine using a 6l80e 6l90e auto trans.

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. Our stock harnesses are 4 feet from the rear of engine passenger side. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. We use the highest quality wire brand new oem connectors weatherproof fuse and relay box.

Please call for harness package with programmed computer. Actual product may vary. Brand new standalone ls3 l99 swap drive by wire wiring harness. Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses.

Speartech also provides ecm programming including e38 e67 e40 e92 ls lt engine wiring harness reworks and conversion adapters and programming. The are built with new gm delphi connector and high temperature wires. The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights. Made in usa with a start up guarantee.

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. Available options transmission electric fans air conditioning and upgraded braided loom. 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. They are completely plug and plays with only 4 wires switched power constant power and ground connections.

The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. All psi harnesses are made in the usa. 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.