FUEL INJECTION HARNESSES

2007+ Gen IV LS3 Engine - Throttle By Wire

Painless Performance 2007+ Gen IV LS3 Engine - Throttle By Wire Painless Performance 2007+ Gen IV LS3 Engine - Throttle By Wire
  • Year: 2007+
  • Make: GM
  • Engine: LS3
  • Trans: 4L65E

This harness is designed for use on any 2007 and up LS3 with throttle by wire. It uses the factory ECM & TCM and will operate engines with or without variable valve timing (VVT) and active fuel management (displacement on demand or DOD). Our free tuning program is only compatible with a 4L65E transmission. You can however, use any GM 4 speed electronic or manual transmission with this harness, with the proper tuning from your tuner. This harness does not support flex fuel operation and will not work on GTO's. Included with this harness is a 10 circuit weatherproof fuse block & mounting bracket, detailed step-by-step manual, GM color coded wires with labels, and all the required terminals and connectors for easy installation.


This standard length harness allows four feet from the back of the intake manifold to where the fuseblock and ECM mount. Perfect for those that plan to mount these components under the dash or in the glove box.


This harness also requires the following mating parts; ECM #12597121 (Painless # 60701) or #12612384 (Painless # 60702); TCM #24234503(Painless # 60710); Accelerator pedal #25832864 or #25835421.


Purchase this harness today and qualify for Painless Performance®™ to flash your ECM for free. Click here for details.

  • Number of Circuits: 10 Fuses with 2 Ignition, 1 Cooling Fan & 1 Fuel Pump Relay
  • Harness Length: 4 Feet Between Engine and ECM
  • Fuse Type: Mini Blade
  • Firewall Passthrough: Grommet
  • Circuit Designations: Printed Wire Tags on all Connectors and Open Ended Wires

The Fuse Block Protects The Following Circuits:
ECM and Data Link Connector B+
ECM and Malfunction Indicator Lamp
Fuel Pump
Heated O2 Sensors
Ignition Coils
Injectors
Mass Airflow and Valve Lifter Oil Manifold (DOD)
TCM
TCM B+
Transmission
40 Amp Cooling fan Relay and Circuit Breaker (ECM Activated)
20 Amp Fuel Pump Relay
40 Amp & 20 Amp Ignition Relays


This harness includes connections for the following components:
Accelerator Pedal Position Sensor
Alternator (Including a 4 gauge power wire)
Brake Switch
Cam Position/Cam Phazer Sensor
Cooling Fan
Crank Position Sensor
Data Link Connector
Driver/Pass Front O2 Sensors
Driver/Pass Knock Sensors
ECM
Engine Coolant Temperature
Fuel Pump
Grounds
Ignition Coils
Ignition Switch Signal
Injectors
Input Speed Sensor 4L80E/4L85E
Malfunction Indicator Lamp
MAP Sensor
Mass Airflow / Intake Air Temperature Sensor
Oil Pressure Sensor
PRNDL Switch
Reverse Lights
Starter
TCM
Throttle Body
Transmission
Valve Lifter Oil Manifold (DOD)
Vehicle Speed Sensor
VSS Output for Speedometer


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