Engine Wiring Harness; Incl. Complete Wiring Harness;
Designed for the 1997-2004 throttle by wire LS1/LS6 engines with 4L60E/4L65E automatic or T56 manual transmission. Harnesses do not include any emissions related connections. Includes an 8 circuit modular fuse block and GM color coded wires with labels for easy installation. This standard length harness allows four feet from the back of the intake manifold to where the fuse block and ECM mount. Perfect for those that plan to mount these components under the dash or in the glove box. Requires the following mating parts; ECM #12200411; TAC Module #12578953; Accelerator Pedal #12565643. Fuse block protects the following circuits: DLC B+, Driver Side Injectors and Coils, Dual 40 amp Ignition Relays, Fuel Pump, Heated O2 Sensors, Mass Airflow Sensor, & Brake Switch, Pass Side Injectors and Coils, ECM and Malfunction Indicator Lamp, ECM B+, Transmission and TAC Module. Includes connections for: Accelerator Pedal Position Sensor, Alternator , Brake Switch, Cam Position Sensor, Clutch Pedal Position , Crank Position Sensor, Cruise Control, Data Link Connector, Driver/Pass Front O2 Sensors, Driver/Pass Knock Sensors, ECM, Engine Coolant Temperature, Fan #1 Relay Ground ECM Activation, Fan #2 Relay Ground ECM Activation, Fuel Pump, Fuel Pump Relay, Fuel Pump Test, Gear Indicator Switch, Grounds, Ignition Coils, Ignition Switch Signal, Injectors, Malfunction Indicator Lamp, MAP Sensor, Mass Airflow/Intake Air Temperature Sensor, Oil Pressure Sensor, Reverse Lockout Solenoid, Skip Shift Light, Skip Shift Solenoid, Starter, Tachometer, Throttle Actuator Control Module, Throttle Actuator Control Module to Accelerator Pedal Pigtail, Throttle Actuator Control Motor, Throttle Position Sensor, Transmission, Vehicle Speed Sensor, VSS Output for Speedometer. PLEASE NOTE: This harness is standalone and is not intended to replace the OEM engine wiring. Standalone harnesses are intended to run the designated engine & transmission only, generally when swapped into another vehicle.
  • Drive By Wire Applications
  • Factory Style Connectors For All Required Sensors
  • Integrated 30 Amp Fuel Pump/40 Amp Cooling Fan/Ignition Relays
  • 4 ft. Of Harness Length Between ECM And Main Engine Breakout
  • Harness Includes A 4 gauge Alternator Charge Wire
  • Controls 4L65E/70E/80E/85E Transmissions
  • See Catalog Or Website For Further Details
  • Guaranteed For Life

Fast Efficient Shipping

Through our distribution network Deliveries can be as fast as Next Day Delivery.
Delivery times vary by destination, tracking information is provided with every purchase.

Get it Installed

JB's Power Centre offers on-site professional installation services in Calgary and Edmonton, AB.
We have on staff licensed Mechanical Technicians as well as MECP Certified 12-Volt Technicians.

* Extend your products Manufacturer Warranty

All products include a manufacturer warranty, but you can extend this warranty with
JB's Purchase Protection Plan
*Available on select products.