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. No oil pressure sensor wire is provided/catered for, as this is a aftermarket loom and relies on aftermarket engine management to cater for oil pressure monitoring

PFEWH1201-1 has 5 pin MAF sensor  loom plug    PFEWH1201 has early 3 pin & later 5 pin MAF sensor loom plugs

Kits Include:

  • Fuse/Relay Box
  • Fuel Pump Control
  • Fan Controls
  • Check Engine Lights
  • Speedometer/Tachometer
  • OBD2 Compatibility
  • Pedal and Throttle Control
  • IAC Sensor
  • MAP Sensor
  • MAF Sensor 5 pin Late Gen 3 
  • Coolant Sensors
  • Alternator Plugs
  • O2 Sensors
  • Crankshaft and Camshaft Position
  • Fuel Injectors
  • Coil Packs
  • Knock sensors

More From This Category

Rostra Transmission External Repair Harness, 4R100, E40D, Ford, Lincoln, 1995-1998

Rostra Transmission External Repair Harness, 4R100, E40D, Ford, Lincoln, 1995-1998

$64.37

FAST XIM Universal Connector Kit

FAST XIM Universal Connector Kit

$190.54

FAST Dual Sensor Upgrade Kit

FAST Dual Sensor Upgrade Kit

$327.05

MSD Wiring Harness, Replacement, 6AL2, Each

MSD Wiring Harness, Replacement, 6AL2, Each

$93.10

Haltech Inputs and CAN Expansion, CAN Adaptors Hubs and Cables, Haltech CAN Cable 8 pin Black Tyco to 8 pin Black Tyco Length: 150mm (6"), Each

Haltech Inputs and CAN Expansion, CAN Adaptors Hubs and Cables, Haltech CAN Cable 8 pin Black Tyco to 8 pin Black Tyco Length: 150mm (6"), Each

$50.00