LS3 Harness 2008-12 E38 ECM

Starting at: $950.00
Sale: $760.00
Save: 20% off

Speed Scene Wiring will supply you with our new pro series true LS3 wire harness, hand made in Texas, where the best LS7 wire products come from, with TXL and GXL synthetic wire, this harness is based on the E38 ECM platform. All connectors are GM speck, Delphi,Denso, Bosch and conform to the highest grade of GM engineering. The SSW pro series LS3 harness offers 5ft of trunk length, from the right rear of the engine to the LS3 E38 ECM.

The picture at view is the actual harness we build in house, from scratch. Note : options that you add may change the physical look, but the form stays the same what you see is what you get.

The benefits of fly by wire system are. You won’t have to worry about hanging a pedal or ordering a special cable / bracket. Just let us know the requirements that your environment creates and we will build you a solid LS3 fuel management harness.

You also have the option of placing a mechanical throttle body on, if you choose the 58x to 24x converter package. We will build the harness to speck and you have the option of running the 4L60E, 4L80E and standard transmission.

  • Fuse Box Included
  • Programming of GM ECM Required
  • DLC That Works
  • Fuel Pump Relay Included
  • All Triggers and Functions Tailed out
  • Diagnostic Capability (ALDL)
  • New GM Connectors & Terminals & Seals .
  • New TXL & GXL Wire.
  • STD Trans
  • Place your order today.

This harness is supplied with either a T56 transmission unless ordered otherwise, and is a true no emissions harness.

Have a question, Call or Text 210-757-0672 and email Info@speedscenewiring.com Contact us now.


Add to Cart:

  • Model: LS3+ wire+ harness+LS3 wiring
  • Shipping Weight: 40lbs
  • 100 Units in Stock
  • Manufactured by: Speed Scene Wiring. LLC

Harness Options:

TCM Wiring Harness (AUTOMATIC)




Accelerator Pedal




TCM Module




Frame Mount Fuel Pump




Fuel Filter




New ECM & Program





This product was added to our catalog on Sunday 27 May, 2012.

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