Proflow's LS standalone wiring harness kits offer the best in aesthetics and reliability, designed specifically for GM LS engines produced from 1997 to 2004. They are available for both cable-driven and fly-by-wire vehicles with 4L60E or T56 transmissions, and will completely replace your old harness.

Note: These are based off original LS harnesses. Some plugs may be different depending on engine build date.

Kits Include:

  • Fuse/Relay Box
  • Fuel Pump Control
  • Fan Controls
  • Check Engine Lights
  • Speedometer/Tachometer
  • OBD2 Compatibility
  • Pedal and Throttle Control
  • MAF/MAP Sensors
  • Coolant Sensors
  • Alternator Plugs
  • O2 Sensors
  • Crankshaft and Camshaft Position
  • Fuel Injectors
  • Coil Packs
  • Knock sensors

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