Ls3 Wiring Harness

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.

Ls3 wiring harness.

Brand new standalone ls3 l99 swap drive by wire wiring harness. Made in usa with a start up guarantee. 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 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.

This includes the lt1 ls1 ls2 ls3 ls7 l99 l76 l77 l92 l98 lm7 lm4 lsa ls9 l83 and the new gen v lt1. Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights. They are completely plug and plays with only 4 wires switched power constant power and ground connections.

The wire in painless performance kits runs a little larger than the standard. 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. Available options transmission electric fans air conditioning and upgraded braided loom.

The wiring harness lengths are designed so you can mount the ecm under the dash. Please call for custom ecm and or fuse box location extra length. We use the highest quality wire brand new oem connectors weatherproof fuse and relay box. Our stock harnesses are 4 feet from the rear of engine passenger side.

Speartech is your ls lt wiring harness swap specialist. 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. 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. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge.

We also specialize in ls and lt swap standalone harnesses. Engine harness for ls2 ls3 vortec 58 tooth engine shown. All psi harnesses are made in the usa. It is really that simple with the factory fit harnesses from bp automotive.

Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses. No cores or modifications needed. Please call for harness package with programmed computer.