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Custom Made 4U Stand Alone LS1 GM Engine wiring harness

Custom Made 4U Stand Alone LS1 GM Engine wiring harness

Your Price:$686.65
Retail Price:$762.95
Your Savings:$76.30(10%)
In Stock
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Part Number:1284
Stand Alone
1997 - 2004 LS1
Engine Management
Wiring Harness.

Harness shows is for use on LS1 motors from a 1997 - 2004 (Specify year, transmission type, make, and model of computer when ordering), perfect for crate motors. The all inclusive harness is brand new built from scratch with 4ft of length from the engine to the ECM and Fuse Block, ECU is NOT provided. Professionally built to exceed OEM Standards. Not a simple bypass, but a complete stand alone engine management system harness, includes harness for transmission (Specify Manual or Automatic when ordering).

The VATS ( Vehicle Anti-Theft System ) will require reprogramming of the ECU or an separate VATS bypass module ( Not included - Add $35 extra ) only works with 2002 and earlier LS1 computers ( 2004 GTO LS1 ECU requires reprogramming ).

Due to the custom nature of this product, shipping can take up to 20 business days (2 - 4 weeks) if you have a rush and need it sooner, please contact us and we will let you know if we can fit it in sooner.

No Previous Wiring
Electrical Experience

Just plug it in, and make a few labeled
connections it is that simple.

Additional customization
and/or add-ons available:

  • ECU Computer reprogramming
    (Inquire for quote - ECU not provided)

  • VATS bypass Module - Add $35

  • LS2 mini-harness - Add $50
    (For using LS2 Intake & Throttle Body on LS1)
  • LS2 mini-harness and injector plugs - Add $85
    (For using LS2 Intake and injectors on LS1)

  • LS1 coil relocation kit - $65
    (For hiding coils out of view)
  • Drive By Wire - Add $85

  • Additional Length from Engine to ECM - Inquire

  • Other special customizations available - Inquire

Harness Features:

  • Harness shown is designed to work on a 98 - 04 LS1 motors with manual transmission (Automatic similar)

  • Harness is:
    100% complete
    All OEM Connectors, not replicas or cheap copies

  • All relays and fuses are included

  • Covered with split loom just like factory

  • Only High Quality GXL wire used for protection from heat.

  • Contains all of the necessary plugs, connectors and wiring for:
    • OBDII
    • Injectors
    • Sensors
    • Ignition
    • A/C compressor
    • Starter
    • High and Low speed Electric fans
    • Fuel Pump

  • O2 sensors relocated from factory harness design to work with either the stock manifolds, shorty headers, or long tube headers.

  • Fuses and Relays for:
    • A/C compressor
    • Fuel Pump
    • ECM, Coils & Injectors
    • MAF
    • O2 sensors
    • Transmission including Back-up Lamps

  • Wires to be spliced in from the body harness are all labeled and are:
    • Transmission
    • Speedo
    • Tach
    • Fuel Pump
    • Cranking signal to starter
    • Back-up Lamps
    • 12V switched ignition
    • Check Engine lamp
    • A/C Request
    • VATS
    • Electric Fans 1 & 2.

  • VATS bypass wire - VATS bypass module NOT included
    Note VATS only works on 2002 and earlier LS1 Engine ECUs.

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